<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Archiving and Interchange DTD v1.0 20120330//EN" "JATS-archivearticle1.dtd">
<article xmlns:xlink="http://www.w3.org/1999/xlink">
  <front>
    <journal-meta />
    <article-meta>
      <title-group>
        <article-title>Technical and Social Reasons for Blocking Web Advertising in the Context of Sustainable Development of E-Business</article-title>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <string-name>Edyta Abramek</string-name>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Anna Sołtysik-Piorunkiewicz</string-name>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Artur Strzelecki</string-name>
          <xref ref-type="aff" rid="aff0">0</xref>
        </contrib>
        <aff id="aff0">
          <label>0</label>
          <institution>Department of Informatics, University of Economics in Katowice</institution>
          ,
          <addr-line>Katowice</addr-line>
          ,
          <country country="PL">POLAND</country>
        </aff>
      </contrib-group>
      <abstract>
        <p>The article focuses on the complex problem of synergy of the expectations of recipients of web content - users with the expectations of content creators - publishers, who make them available free of charge but at the same time complement them with web advertisements. The article presents the results of author's research of users' reasons to block web advertisements through special adblock programs, thus condemning publishers' in e-business to failure. The results of empirical research prove that users do not interfere with advertising sensu stricto, but the way in which they are delivered to internet users. The results will be useful for developers of solutions, models or information systems for sustainable development in the area of e-business, in particular in the area of e-marketing.</p>
      </abstract>
      <kwd-group>
        <kwd>Adblock</kwd>
        <kwd>E-business</kwd>
        <kwd>Sustainable development</kwd>
        <kwd>Web advertisement</kwd>
      </kwd-group>
    </article-meta>
  </front>
  <body>
    <sec id="sec-1">
      <title>-</title>
      <p>Nowadays, computer science supports the complexity of both the system
configuration level and the use of them. The blocking of advertisements from content displayed
on websites is a particularly important problem nowadays. From the point of view of
the content publisher or advertiser, the blocking of advertisements by users of portals
or websites can contribute to the failure of their online business. In turn, users
blocking the reception of advertisements limit their access to content of portals or websites.
Publishers have IT tools that effectively detect programs that block advertisements
and then prevent access to the content of the website in case such software is installed
and active on the user's computer.</p>
      <p>In connection with the striving to achieve the best result in terms of sustainable
development in e-business, a compromise between three groups of stakeholders, i.e.
recipients of content and at the same time ads, publishers and advertisers is necessary.
Based on a short debate on blocking advertisement, the goal of this research is to
Copyright © 2019 for this paper by its authors. Use permitted under Creative
Commons License Attribution 4.0 International (CC BY 4.0)
examine the technical and social reasons why user are more and more using adblock
software.</p>
      <p>The thesis and research objectives adopted in the work determined its character and
structure, as well as the applied research methods. The first chapter shows the
introduction. The second chapter is devoted to the characteristics of online advertising,
ways of blocking advertisements and relations between publishers (content providers)
and their recipients in the context of sustainable development in the area of
ebusiness. The third chapter characterizes reasons or reasons for blocking
advertisements by users of portals and websites. The fourth chapter presents the results of
empirical research, including the division into technical and social factors blocking
advertisements on the Internet. The work ends the chapter fifth with a summary
presenting the conclusions.
2
2.1</p>
      <p>Related Works</p>
      <p>Characteristics of Web Advertising and Ways of Blocking them</p>
      <p>Referring to the report [1], Poland is one of the leading countries where Internet
advertising is blocked. The phenomenon is not conducive to the development of the
electronic business of companies that earn money by displaying ads. The perspective
of charging instead of advertising is not beneficial either for publishers or for content
recipients.</p>
      <p>Some descriptions of cases are characterized in internet by the users [2] in context of
prevented users by website publisher [3] from blocking advertisements. The first one
is based on the basis of legal regulations and the right to maintain the integrity of r
website publisher work, or the right to not allowing the ads blocking, because it is the
beginning of change of the content and form of website publisher work [4], [5]. The
second point of view of publisher is to establish cooperation with creators of
programs for blocking advertisements [6] and to create advertisements which users were
unable to filter because of usage blocking software [7].</p>
      <p>Nowadays, programming techniques allow to detect mechanisms blocking
advertisements very effectively, and then prevent access to the website when adblock programs
are active and set to block advertisements [8][9]. With blocking ads, you can
effectively fight at the technology level [10]. Mastering the phenomenon at the social level
is not so easy. Companies that offer content on the Internet understand that you
cannot resort to the simplest method, i.e. a total ban on access to content, because Internet
users will look for content on other, free websites [11]. Therefore, a better solution is
to deliver ads in a form adapted to the expectations of Internet users. A surfer should
be able to decide and choose how he wants to receive advertisements. According to
the report [1], users of websites or websites oppose only the methods and ways in
which advertisements are made available to them, delivered. It is therefore necessary
to create IT solutions that will reconcile the expectations of publishers and internauts
blocking advertisements.</p>
      <p>The most popular forms of online advertisements are banners, which are referred to
as “conventional advertisements”. They consist in placing graphic elements of various
forms and sizes on a website. The elements redirect the interested party to the
advertiser's website. Such a form of advertising allows a company to establish its online
presence and enhance its image. The many types of banner advertisements include
main banners, pop-ups, pop-unders, expand banners, skyscraper, rectangle and scroll
banners or floating banners. Apart from banner advertisements, there are also the
following types of advertisements:
• top layer - advertisements displayed only once in the form of an animation with its
sound on by default,
• brandmark - it is a variety of a pop-up advertisement,
• interstitial - an advertisement displayed as a 10-second full-screen animation,
• floating ad - a specific type of a moving advertisement which floats over the
website and browsed content, encouraging users to click on it (it can be perceived as a
harassment),
• watermark - a form of an online advertisement displayed as a background,
• trick banner - an advertisement which is actually a form of deception or fraud. It
contains a text encouraging the user to click it and which takes the user to a
different, infected website.</p>
      <p>Nowadays the internet users are more and more resistant to different forms of
advertisement than before. They have become better prepared for receiving the internet
promotion of products and services. They seem to be better focused on reviewing the
certain criteria of advertisement, i.e. location, contrast and size of the advertising unit
[12] then during the initial period of internet development. The advertisements’ forms
are still very popular but no longer as efficient as they used to be. The content
providers and publishers are still interested in making progress with their marketing
campaigns. There are two different kind of “conventional advertisement” usage in
sustainable business development: the first one is the less aggressive solution of
“conventional advertisement”, and another is more aggressive one. A less aggressive
“conventional advertisement” is characterizing as the native advertising, i.e.
interesting content of an article is posted on a blog, in social media or on a website by web
company. To promote the product or service offers is very difficult so that is the
reason why advertising is becoming more and more aggressive (they obscure the
picture, they start the sound, they pop up suddenly, etc.) The aggressive usage of
“conventional advertisement” makes that the users are more and more ready to use the
web browser plug-ins as adblocking software so cold adblocks. The term adblock is
using as well as a construct of group of programs for blocking online advertisements.
There are four different types of web browser plug-ins [13, 14] which block
advertisements: AdBlock, Adblock Plus, uBlock and uBlock Origin.</p>
      <p>There is also performing so-called non-intrusive advertising. Examples of
nonintrusive advertisements are advertisements in search engine search results. The
advertisements appear only after a user enters a query in the search engine and receives
results.
2.2</p>
      <p>
        Relation between Content Publishers and their Recipients for the
Sustainable Development of E-Business in the Field of Web Advertising
The shape and nature of sustainable development in business is determined by the
relations of the producer (manufacturer, content creator, sender) with stakeholders
(users, customers, recipients of content) (Fig. 1). The higher the value of stakeholders
gathered around the company, the greater the likelihood that the company will survive
on the market [15]. Social sustainability requires responding to the needs of society.
Therefore, in the world of internet advertising, the point is not that publishers and
recipients of the content mutually overwhelm each other, but they started to cooperate
with each other. According to the
        <xref ref-type="bibr" rid="ref1">PageFair-2017</xref>
        report [1], users are not disturbed by
advertisements as such, but rather by the way they are displayed.
There are some relations between publisher, advertiser and user according to the
sustainable development principle in web advertisement context in e-business. The
following principles should be adopted:
• The publishers should use users' knowledge and experience in case of form of
advertisement and propose advertisements, if they constitute their source of income.
• The publishers and advertisers should allow users, i.e. the recipients of content,
portals or websites, to make the decision in case of invasive or not interesting
advertisement.
      </p>
      <p>There are already programs on the market that combine the ability to detect an
advertisement blocker and deactivate it, and at the same time deliver them in a form
suited to the expectations of Internet users.
3</p>
      <p>Investigating the Reasons for Blocking Web Advertising
There are different reasons connecting with blocking web advertisement. The research
shows, that the users’ privacy [16] of their data and confidentiality of their online
activities is the most important factor, and due to that personalized advertisements are
perceived as a threat, and unknown advertisements usage can be the source of a risk
of additional costs (using data transmission packages), so that is the main reason that
they are simply blocked by users [17, 18]. Therefore, it is necessary to find the proper
strategy based on investigated reason to stop blocking advertisements in sustainable
development of e-business.</p>
      <p>
        Exploring the reasons for blocking online advertising is a complex topic [19][20].
Advertisement blocking is a topic which should be considered from multiple
perspectives. The last
        <xref ref-type="bibr" rid="ref1">PageFair-2017</xref>
        report showed [1], that the main reason for blocking
advertisements using an adblock was [2]: security, interruption, speed, to many ads,
privacy, poor frequency camping and other. Comparing user gender women usually
mentioned that they were afraid of viruses and malware, and men claimed that the
greatest nuisance was the interference of advertising in continuous browsing of online
content. There is more than one reason of blocking the advertisement. Over 70% of
respondents chose more than one reason as “the most important one” in connection
with their use of an adblock.
      </p>
      <p>Users do not mind advertisements as such, and they are bothered rather by their
aggressive form, such as a sudden sound or an advertisement suddenly covering the
browsed content and, additionally, the advertisement not allowing to be skipped or
closed.</p>
      <p>The PageFair’a report index of blocking ads for Poland in 2017 amounted to 33%,
while in 2015 it maintains the level of 34,9% [1]. The other study published in 2018
showed that 61,2% Polish internet users are using adblock software [21]. Currently, it
is estimated that it is as much as 38% of internet users. Countries where ads are
blocked are also Greece, Germany and Sweden. Apparently, the reasons for this
phenomenon are overloaded with advertisements.</p>
      <p>Table 1 presents the main reasons for blocking advertisements, taking into account
two categories: technological reasons - specific for the website, for advertising and
the type of device and social reasons - specific for users of websites.
Use of interactive advertising, too many ads on the website, advertising
takes up the whole screen, automatic, suddenly playing sound, difficult
closing advertising - the X button can’t be found, overlay other content
by advertising, obstruction in receiving content, no ability to filter ads,
Transfer fees on mobile devices, need to increase internet link bandwidth
to play ads
Privacy protection, phishing protection, protection against tracking by
unknown sites
3.1</p>
      <p>Research Methodology, Objectives and Area of the Research
Due to the fact that the research was focused on data mining, the quantitative method
was used. In order to identify the reasons for blocking advertisements by people, a
questionnaire was built, and statistical methods of data processing were used. The
survey was conducted electronically in 2017 in Poland. The research methodology
included the following steps:
• analysis of the literature on the subject,
• selecting a research gap,
• creating a research model,
• formulation of the research thesis,
• conducting proper tests,
• data analysis,
• conclusions from research,
• enriching the theory with test results,
• indication of the limitations of the tests carried out,
• conditions for further research.</p>
      <p>The main idea of the considerations there is a thesis that the reason for blocking
advertisements by people is not advertising sensu stricto but the manner and frequency
of their delivery to Internet users and the risks associated with it. The theoretical,
methodological and practical goals were distinguished in the paper.</p>
      <p>The epistemological purpose of the work is:
• determination of relations between stakeholders in the area of internet advertising,
in the context of sustainable development in e-business,
• analysis of technical and social reasons for blocking internet advertising by website
users.</p>
      <p>The methodical aim is:
• development of guidelines / guidelines for stakeholders in the area of internet
advertising for sustainable development.</p>
      <p>Purposes utilitarian/practical relate to:
• diagnosis of the reasons for blocking advertisements based on the conducted study,
• developing recommendations in the area of internet advertising for the sustainable
development of companies in e-business and synergy of the expectations of
publishers, advertisers and users of portals or websites.
3.2</p>
      <p>Advertising blocking factors - results of scientific research</p>
      <p>In order to recognize the activity of users of computer programs blocking the
content of online advertisements, an electronic questionnaire was developed. The
study was conducted in 2018. The target group of the study included the people of
different ages. In total, responses were collected from 774 surveys. The results are
characterized by the following categories:
• gender and age,
• use of advertising and sources of knowledge about advertising,
• reasons for blocking online advertisements with their division into technical and
social reasons.</p>
      <p>The most of the respondents were men, i.e. 56.1%. The men are blocking the
advertisements more often than women. There was 55.3% of higher education
graduated people in among group of people who completed the survey. The secondary
education accounted for 44.5%. There were also people with vocational education.
The largest group of respondents was people with age of 18-24 (Table 2) and as it
turns out, they most often block advertisements.
The respondents learned on the possibility of blocking advertisements in the
following ways: from friends (31.5%), from the Internet (22.7%), from the browser settings
(8.7%). At the same time, 35.4% of people do not remember where they found out
about adblock computer programs.</p>
      <p>Percentage
of respondents
56,30%
32,80%
9,00%
1,90%
100,00%
596
165
13
774</p>
      <p>Using adblock
program’s index
80,30%
75,60%
69,00%
43,00%</p>
      <p>77,00%
21,30%
1,70%
100,00%
Age group
18-24
25-34
35-44
Others
Summary</p>
      <p>Number
of respondents
436
254
70
15
774</p>
      <p>The respondents’ diversity
The people who use the adblock
program
The people who do not use the adblock
program
The people who do not know about the
adblock program
Summary
The 77% of respondents admitted that they use a program to block online
advertisements, but there are also people who do not know about the existence of such a
program (Table 3).</p>
      <p>The results presented in the further part of the work concern only people who use
the adblock program, i.e. 596 respondents (out of 774). Each of the 596 people
(100%) has an adblock program installed on a desktop computer, 99 people (16.6%)
on a smartphone, and 54 people (9.1%) on a tablet. The most people, i.e. 400 (67.1%)
use the default adblock settings, and the rest of the people configure the program
according to their needs. Out of 596 respondents, only 77 people (12.9%) do not
exclude this program. Most people, i.e. 519 (87.1%) actively disable the program to gain
access to blocked content.</p>
      <p>There are at least two reasons why users of content blockers temporarily disable
them:
• firstly, there is a need to temporarily use content that is unavailable or invisible due
to adblock activity (301 people, 58%),
• secondly, it's about permanently turning off adblock for a selected website or
adding it to the list of exceptions (218 people, 42%).</p>
      <p>After encountering adblock-wall, the majority of respondents (517 people, 55.5%)
disables adblock, or add a website to exceptions and use its content. Fig. 2 shows the
most important reasons, why users block advertisements?</p>
    </sec>
    <sec id="sec-2">
      <title>Interruption - Advertising interferes…</title>
    </sec>
    <sec id="sec-3">
      <title>Too many ads - Too many ads on the…</title>
    </sec>
    <sec id="sec-4">
      <title>Others</title>
    </sec>
    <sec id="sec-5">
      <title>Speed - Slow loading websites</title>
    </sec>
    <sec id="sec-6">
      <title>Security - Protection against…</title>
      <p>Privacy - Protection of privacy and…
4.20%
3.50%
2.50%
1.70%
37.80%
50.30%
As has already been mentioned, Poland is at the forefront of countries that block
advertisements. As a result of the survey, the biggest problem for Internet users is
successively: interruption (50,3%), too many ads (37,80%), speed (3,50%), security
(2,50%). For comparison, the results of the Page-Fair-2017 report differ. The main
reason for blocking ads according to the said report were successively: security,
interruption, speed, too many ads and privacy.</p>
      <p>As a result of the research, it was also determined which type of advertising causes
the greatest reluctance of the recipient. Respondents asked about what form of
advertising they accept or which they do not accept answered the answers, provided
the answers presented in the table 4.</p>
      <p>If we divide the group according to gender, it turns out that all males know what
adblock is and either use it (78,3%) or not. Among females, 13 respondents answered
that they did not know what adblock was. Within that group, 75,2% use adblock.</p>
      <p>When it comes to using adblock and the education of the respondents, both the
group with secondary and higher education have the same percentage of adblock
users (78,3%).</p>
      <p>Further analysis will consist of more detailed presentation of the results in two
most widely represented age groups who use adblock. Everyone uses adblock on an
ordinary computer. Interestingly enough, within the 25-34 age group, it is more
frequently installed on smartphones and tablets as well - 17,7% and 12,5% respectively,
and within the 18-24 age group the numbers are - 14,6% and 4,5%. Despite of the fact
that the 18-24 age group is most widely represented in the research, using adblock on
mobile devices is less widespread here that in the 25-34 age group.</p>
      <p>With respect to configuring adblock software on their own, also the group aged
2534 demonstrates bigger activity (38% defines the way adblock functions on their own,
and in the younger group the percentage is 28%).</p>
      <p>Both groups behave in a similar way with respect to switching off the adblock
software. The respondents aged between 18-24 declare that 88,2% of them swith off
the adblock software and within the group aged 25-34, the procedure is followed by
88,5% of adblock users.</p>
      <p>Both groups respond similarly to the question, why they switch off the adblock
software? 59,7% of respondents aged 18-24 temporarily switch off the adblock
software in order to access the content and then switches it on again, while within the
group aged 25-34, the procedure is followed by 57,9% of respondents. The behavior
changes when the respondents clash with adblock-wall. 81,9% of respondents aged
18-24 clash with this type of blockade while browsing websites with adblock
switched on. An even bigger percentage of respondents, i.e. 93,2% within the group
aged 25-34 clash with this type of blockade before accessing the content. Within the
group aged 18-24, after clashing with the blockade, 35,4% of the respondents leave
the website, and a vast majority switches off the adblock software and accessed the
content that was not available before. With the group aged 25-34, the division is
different - 49,7% of the respondents, when clashing with the blockade, leave the website
and the second half of the respondents after clashing with the blockade, decide to
switch off the adblock software.
• Age group 18-24 - 56,30% of Internet users block internet advertising,
• Age group 25-34 - 32,80% of Internet users block internet advertising,
• Age group 35-44 – 9% of Internet users block internet advertising.</p>
      <p>The older the user, the less often it blocks unwanted content.
Respondents aged 18-24 declare that in 88.2% they exclude adblock software to gain
access to content, and in the group of people aged 25-34 - 88.5% of users disable the
adblock program. Both groups of respondents react similarly to blocking
advertisements. After the collision with adblock-wall, in the group of 18-24% up to
35.4% of the respondents will leave the website, and in the group of 25-34 years the
website will leave as many as 49.7% of the respondents. Other people (constituting
the majority) decide to disable the blockade to access the content.</p>
      <p>The main reason for blocking ads is:
• 50.30% of Internet users complain about too often displaying advertisements,
• 37.80% of Internet users complain about excess advertising on the web.
Users mainly pay attention to the technical aspects of ad blocking (Table 5). They are
able to accept 77.7% static graphic or text banners. The biggest dislike among Internet
users is caused by audio advertisements (99%).
* The table contains the results that were tested on a group of 596 users.
4</p>
      <p>Summary and Future Research
% Index*
2,50%
3,50%
50,30%
37,80%
1,70%
As a result of the conducted research, the thesis was confirmed that the reason for
blocking advertisements by users is not advertising sensu stricto or the content of the
advertisement, but the manner and frequency of delivering the advertisement to the
recipient of the content. The study showed that ads are blocked because:
• they prevent people from receiving content,
• there are too many of them on the website,
• they delay the speed of loading of websites,
• they decrease cyber security and data protection.</p>
      <p>Therefore, if the content providers or advertisers want to convince the recipients of
the content not to use blocking, they should take care of delivering the advertisement
in the form adapted to the expectations and convenience of the Internet users, and not
for blocking or legal solutions. It is necessary to create conditions that will not violate
the convenience of browsing the web pages so that the user does not receive
advertisements invasive, ubiquitous, badly adjusted, not interesting, harassing and
heavy on processing power.</p>
      <p>This paper has two major contributions. First, we described the reasons why Polish
user is blocking advertisements, by using adblock software together with internet
browsers. The main reason is that advertisements are annoying. Second, we described,
what are the acceptable advertisement format, that user would not block if they appear
in the browser. The user is mainly accepting text advertisements.</p>
      <p>The authors are aware of the limitations of the research study. The study was mainly
addressed to people who block advertisements. For activities in the field of
sustainable development, it was also necessary to ask publishers (content creators),
advertisers and programmers who created adblock software to discover the reasons of
changing the advertisement strategy. There are still some research questions to answer
in context of technological and social reasons of blocking advertisement.
13.
14.
16.
17.
18.
19.
20.
21.</p>
    </sec>
  </body>
  <back>
    <ref-list>
      <ref id="ref1">
        <mixed-citation>
          <article-title>Pagefair: The state of the blocked web</article-title>
          . (
          <year>2017</year>
          ).
        </mixed-citation>
      </ref>
      <ref id="ref2">
        <mixed-citation>
          <string-name>
            <surname>Haddadi</surname>
            ,
            <given-names>H.</given-names>
          </string-name>
          ,
          <string-name>
            <surname>Nithyanand</surname>
            ,
            <given-names>R.</given-names>
          </string-name>
          ,
          <string-name>
            <surname>Khattak</surname>
            ,
            <given-names>S.</given-names>
          </string-name>
          ,
          <string-name>
            <surname>Javed</surname>
            ,
            <given-names>M.</given-names>
          </string-name>
          :
          <string-name>
            <surname>The Adblocking</surname>
          </string-name>
          Tug-ofWar. ;Login:
          <volume>41</volume>
          ,
          <fpage>41</fpage>
          -
          <lpage>43</lpage>
          (
          <year>2016</year>
          ).
        </mixed-citation>
      </ref>
      <ref id="ref3">
        <mixed-citation>
          <string-name>
            <surname>Iqbal</surname>
            ,
            <given-names>U.</given-names>
          </string-name>
          ,
          <string-name>
            <surname>Shafiq</surname>
            ,
            <given-names>Z.</given-names>
          </string-name>
          ,
          <string-name>
            <surname>Qian</surname>
            ,
            <given-names>Z.</given-names>
          </string-name>
          :
          <article-title>The Ad Wars: Retrospective Measurement and Analysis of Anti-Adblock Filter Lists Umar</article-title>
          .
          <source>In: Proceedings of the 2017 Internet Measurement Conference on - IMC '17</source>
          . pp.
          <fpage>171</fpage>
          -
          <lpage>183</lpage>
          . ACM, New York, NY (
          <year>2017</year>
          ). https://doi.org/10.1145/3131365.3131387.
        </mixed-citation>
      </ref>
      <ref id="ref4">
        <mixed-citation>
          <string-name>
            <surname>Hemmer</surname>
            ,
            <given-names>J.L.</given-names>
          </string-name>
          :
          <article-title>The Internet Advertising Battle : Copyright Laws Used to Stop the Use of Ad- Blocking Software</article-title>
          .
          <source>Temple J. Sci. Technol. Environ. Law. 1</source>
          ,
          <fpage>479</fpage>
          -
          <lpage>497</lpage>
          (
          <year>2005</year>
          ).
        </mixed-citation>
      </ref>
      <ref id="ref5">
        <mixed-citation>
          <string-name>
            <surname>Vallade</surname>
            ,
            <given-names>J.</given-names>
          </string-name>
          :
          <article-title>Adblock plus and the Legal Implications of Online CommercialSkipping</article-title>
          .
          <source>Rutgers Law Rev. 7</source>
          ,
          <fpage>823</fpage>
          -
          <lpage>853</lpage>
          (
          <year>2009</year>
          ).
        </mixed-citation>
      </ref>
      <ref id="ref6">
        <mixed-citation>
          <string-name>
            <surname>Moro</surname>
            ,
            <given-names>D.</given-names>
          </string-name>
          ,
          <string-name>
            <surname>Benati</surname>
            ,
            <given-names>F.</given-names>
          </string-name>
          ,
          <string-name>
            <surname>Mangili</surname>
            ,
            <given-names>M.</given-names>
          </string-name>
          ,
          <string-name>
            <surname>Capone</surname>
            ,
            <given-names>A.</given-names>
          </string-name>
          :
          <article-title>Catching free-riders: innetwork adblock detection with machine learning techniques</article-title>
          .
          <source>In: 2018 IEEE 23rd International Workshop on Computer Aided Modeling and Design of Communication Links and Networks (CAMAD)</source>
          . pp.
          <fpage>1</fpage>
          -
          <lpage>6</lpage>
          . IEEE (
          <year>2018</year>
          ).
        </mixed-citation>
      </ref>
      <ref id="ref7">
        <mixed-citation>
          https://doi.org/10.1109/CAMAD.
          <year>2018</year>
          .
          <volume>8514955</volume>
          .
        </mixed-citation>
      </ref>
      <ref id="ref8">
        <mixed-citation>
          <volume>916</volume>
          (
          <year>2005</year>
          ). https://doi.org/10.1145/1062745.1062796.
        </mixed-citation>
      </ref>
      <ref id="ref9">
        <mixed-citation>
          <string-name>
            <surname>Sandvig</surname>
            ,
            <given-names>J.</given-names>
          </string-name>
          ,
          <string-name>
            <surname>Bajwa</surname>
            ,
            <given-names>D.</given-names>
          </string-name>
          ,
          <string-name>
            <surname>Ross</surname>
            ,
            <given-names>S.</given-names>
          </string-name>
          :
          <source>Usage and Perceptions of Internet Ad</source>
          <volume>15</volume>
          .
        </mixed-citation>
      </ref>
      <ref id="ref10">
        <mixed-citation>
          <article-title>Blockers: an exploratory study</article-title>
          .
          <source>Issues Inf. Syst. XII</source>
          ,
          <fpage>59</fpage>
          -
          <lpage>69</lpage>
          (
          <year>2011</year>
          ).
        </mixed-citation>
      </ref>
      <ref id="ref11">
        <mixed-citation>
          <string-name>
            <given-names>Ashish</given-names>
            <surname>Kumar</surname>
          </string-name>
          <string-name>
            <given-names>Singh</given-names>
            ,
            <surname>Potdar</surname>
          </string-name>
          ,
          <string-name>
            <surname>V.</surname>
          </string-name>
          :
          <article-title>Blocking online advertising - A state of the art</article-title>
          .
          <source>In: 2009 IEEE International Conference on Industrial Technology</source>
          . pp.
          <fpage>1</fpage>
          -
          <lpage>10</lpage>
          . IEEE (
          <year>2009</year>
          ). https://doi.org/10.1109/ICIT.
          <year>2009</year>
          .
          <volume>4939739</volume>
          .
        </mixed-citation>
      </ref>
      <ref id="ref12">
        <mixed-citation>
          <string-name>
            <surname>Pujol</surname>
            ,
            <given-names>E.</given-names>
          </string-name>
          ,
          <string-name>
            <surname>Hohlfeld</surname>
            ,
            <given-names>O.</given-names>
          </string-name>
          ,
          <string-name>
            <surname>Feldmann</surname>
            ,
            <given-names>A.</given-names>
          </string-name>
          :
          <article-title>Annoyed Users: Ads and Ad-Block Usage in the Wild</article-title>
          .
          <source>In: Proceedings of the 2015 ACM Conference on Internet Measurement Conference - IMC '15</source>
          . pp.
          <fpage>93</fpage>
          -
          <lpage>106</lpage>
          . ACM, New York, NY (
          <year>2015</year>
          ). https://doi.org/10.1145/2815675.2815705.
        </mixed-citation>
      </ref>
      <ref id="ref13">
        <mixed-citation>
          <string-name>
            <surname>Li</surname>
            ,
            <given-names>W.W.</given-names>
          </string-name>
          ,
          <string-name>
            <surname>Hui</surname>
            ,
            <given-names>W.</given-names>
          </string-name>
          ,
          <string-name>
            <surname>Leung</surname>
            ,
            <given-names>A.C.M.</given-names>
          </string-name>
          ,
          <string-name>
            <surname>Yue</surname>
          </string-name>
          , W.T.:
          <article-title>Content Restrictions on AdBlock Usage</article-title>
          .
          <source>In: 21th Pacific Asia Conference on Information Systems</source>
          ,
          <string-name>
            <surname>PACIS</surname>
          </string-name>
          <year>2017</year>
          . p.
          <volume>84</volume>
          (
          <year>2017</year>
          ).
        </mixed-citation>
      </ref>
      <ref id="ref14">
        <mixed-citation>
          <string-name>
            <surname>Walls</surname>
            ,
            <given-names>R.J.</given-names>
          </string-name>
          ,
          <string-name>
            <surname>Kilmer</surname>
            ,
            <given-names>E.D.</given-names>
          </string-name>
          ,
          <string-name>
            <surname>Lageman</surname>
            ,
            <given-names>N.</given-names>
          </string-name>
          ,
          <string-name>
            <surname>McDaniel</surname>
            ,
            <given-names>P.D.</given-names>
          </string-name>
          :
          <article-title>Measuring the Impact and Perception of Acceptable Advertisements</article-title>
          .
          <source>In: Proceedings of the 2015 ACM Conference on Internet Measurement Conference - IMC '15</source>
          . pp.
        </mixed-citation>
      </ref>
      <ref id="ref15">
        <mixed-citation>
          107-
          <fpage>120</fpage>
          . ACM, New York, NY (
          <year>2015</year>
          ).
        </mixed-citation>
      </ref>
      <ref id="ref16">
        <mixed-citation>https://doi.org/10.1145/2815675.2815703.</mixed-citation>
      </ref>
      <ref id="ref17">
        <mixed-citation>
          <string-name>
            <surname>Rens</surname>
            ,
            <given-names>W.</given-names>
          </string-name>
          :
          <article-title>Browser forensics: adblocker extensions</article-title>
          . (
          <year>2017</year>
          ).
        </mixed-citation>
      </ref>
      <ref id="ref18">
        <mixed-citation>
          <string-name>
            <surname>Strzelecki</surname>
            ,
            <given-names>A.</given-names>
          </string-name>
          ,
          <string-name>
            <surname>Abramek</surname>
            ,
            <given-names>E.</given-names>
          </string-name>
          ,
          <string-name>
            <surname>Sołtysik-Piorunkiewicz</surname>
            ,
            <given-names>A.</given-names>
          </string-name>
          :
          <article-title>Adblock Usage in Web Advertisement in Poland</article-title>
          . In: Arai,
          <string-name>
            <given-names>K.</given-names>
            ,
            <surname>Kapoor</surname>
          </string-name>
          ,
          <string-name>
            <given-names>S.</given-names>
            , and
            <surname>Bhatia</surname>
          </string-name>
          , R. (eds.)
          <source>Advances in Intelligent Systems and Computing</source>
          . pp.
          <fpage>13</fpage>
          -
          <lpage>23</lpage>
          . Springer, Champagne (
          <year>2019</year>
          ). https://doi.org/10.1007/978-3-
          <fpage>030</fpage>
          -03405-
          <issue>4</issue>
          _
          <fpage>2</fpage>
          .
        </mixed-citation>
      </ref>
      <ref id="ref19">
        <mixed-citation>
          <string-name>
            <surname>Ming</surname>
            ,
            <given-names>W.Q.</given-names>
          </string-name>
          ,
          <string-name>
            <surname>Yazdanifard</surname>
          </string-name>
          , R.:
          <source>Native Advertising and its Effects on Online Advertising</source>
          . Glob. J.
          <string-name>
            <surname>Human-Social Sci</surname>
          </string-name>
          . E Econ.
          <volume>14</volume>
          ,
          <fpage>11</fpage>
          -
          <lpage>14</lpage>
          (
          <year>2014</year>
          ).
        </mixed-citation>
      </ref>
      <ref id="ref20">
        <mixed-citation>
          <string-name>
            <surname>Gervais</surname>
            ,
            <given-names>A.</given-names>
          </string-name>
          ,
          <string-name>
            <surname>Filios</surname>
            ,
            <given-names>A.</given-names>
          </string-name>
          ,
          <string-name>
            <surname>Lenders</surname>
            ,
            <given-names>V.</given-names>
          </string-name>
          ,
          <string-name>
            <surname>Capkun</surname>
            ,
            <given-names>S.</given-names>
          </string-name>
          :
          <article-title>Quantifying Web Adblocker Privacy</article-title>
          . In: Foley,
          <string-name>
            <given-names>S.</given-names>
            ,
            <surname>Gollmann</surname>
          </string-name>
          ,
          <string-name>
            <given-names>D.</given-names>
            , and
            <surname>Snekkenes</surname>
          </string-name>
          , E. (eds.) Lecture Notes in Computer Science. pp.
          <fpage>21</fpage>
          -
          <lpage>42</lpage>
          . Springer, Champagne (
          <year>2017</year>
          ).
        </mixed-citation>
      </ref>
      <ref id="ref21">
        <mixed-citation>
          https://doi.org/10.1007/978-3-
          <fpage>319</fpage>
          -66399-
          <issue>9</issue>
          _
          <fpage>2</fpage>
          .
        </mixed-citation>
      </ref>
      <ref id="ref22">
        <mixed-citation>
          <string-name>
            <surname>Wills</surname>
            ,
            <given-names>C.E.</given-names>
          </string-name>
          ,
          <string-name>
            <surname>Uzunoglu</surname>
            ,
            <given-names>D.C.</given-names>
          </string-name>
          :
          <article-title>What Ad Blockers Are (and Are Not) Doing</article-title>
          . In: 2016
          <source>Fourth IEEE Workshop on Hot Topics in Web Systems and Technologies (HotWeb)</source>
          . pp.
          <fpage>72</fpage>
          -
          <lpage>77</lpage>
          . IEEE (
          <year>2016</year>
          ).
        </mixed-citation>
      </ref>
      <ref id="ref23">
        <mixed-citation>
          https://doi.org/10.1109/HotWeb.
          <year>2016</year>
          .
          <volume>21</volume>
          .
        </mixed-citation>
      </ref>
      <ref id="ref24">
        <mixed-citation>
          Informatics.
          <volume>35</volume>
          ,
          <fpage>1607</fpage>
          -
          <lpage>1616</lpage>
          (
          <year>2018</year>
          ).
        </mixed-citation>
      </ref>
      <ref id="ref25">
        <mixed-citation>
          https://doi.org/10.1016/j.tele.
          <year>2018</year>
          .
          <volume>04</volume>
          .008.
        </mixed-citation>
      </ref>
      <ref id="ref26">
        <mixed-citation>
          <string-name>
            <surname>Tudoran</surname>
            ,
            <given-names>A.A.</given-names>
          </string-name>
          :
          <article-title>Why do internet consumers block ads? New evidence from consumer opinion mining and sentiment analysis</article-title>
          .
          <source>Internet Res</source>
          .
          <volume>29</volume>
          ,
          <fpage>144</fpage>
          -
          <lpage>166</lpage>
          (
          <year>2019</year>
          ). https://doi.org/10.1108/IntR-06-2017-0221.
        </mixed-citation>
      </ref>
      <ref id="ref27">
        <mixed-citation>
          <string-name>
            <surname>Wielki</surname>
            ,
            <given-names>J.</given-names>
          </string-name>
          ,
          <string-name>
            <surname>Grabara</surname>
            ,
            <given-names>J.:</given-names>
          </string-name>
          <article-title>The impact of Ad-blocking on the sustainable development of the digital advertising ecosystem</article-title>
          .
          <source>Sustain</source>
          .
          <volume>10</volume>
          ,
          <fpage>1</fpage>
          -
          <lpage>14</lpage>
          (
          <year>2018</year>
          ).
        </mixed-citation>
      </ref>
      <ref id="ref28">
        <mixed-citation>https://doi.org/10.3390/su10114039.</mixed-citation>
      </ref>
    </ref-list>
  </back>
</article>