created for promotional or marketing purposes, and indeed data processing, survey-based research, and software testing jobs are also posted on the platform. However, as shown below, the majority of tasks can be categorized as being of a promotional nature (See Table \[ActBudg\]).

Article Structure
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The structure of the present article is as follows. After this introduction, the terminology is presented and a number of ethical questions are posed. This is followed by an outline of the related work in this field. The next chapter describes the research aims and details of the observation, as well as the limitations of the research. This is followed by the Results section, which also contains a number of separate subchapters covering various aspects of the investigation into the most important gray promotional activities, including estimates about their efficiency, security concerns, and possible counter-measures, where applicable. The Results section also describes some observed campaign-supplementing techniques. Finally, the Conclusions section offers a summary and outlines some possibilities for future work.

Why call it a black market?
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In the opinion of the author of this paper buying likes, followers, votes, upvotes, retweets, etc. (the generic term for these used in this paper is social media 