“…The practices and ethics of advertising, in general (Schauster, Ferrucci, and Neill 2016), and social media promotion (Zeng, Kohno, and Roesner 2021), in particular, have been debated by researchers. Related work has highlighted particularly questionable practices, such as astroturfing (i.e., hidden coordinated information campaigns that mimic genuine user behavior by incentivizing agents to spread information online) for consumers (Kauppila and Soliman 2022;Lee, Tamilarasan, and Caverlee 2013) and citizens (Schoch et al 2022). Dutta and Chakraborty (2021) have studied blackmarket services that are employed by "collusive" users to inflate the popularity of their online account and get appraisals for their content, while spam has been a topic of intensive research over the years (e.g., Benevenuto et al 2010;Yardi et al 2009).…”