https://techcrunch.com/2018/11/06/study-of-political-junk-on-facebook-raises-fresh-questions-about-its-metrics/ > A midterms election study of political disinformation being fenced by Facebook’s platform supports the company’s assertion that a clutch of mostly right-leaning and politically fringe Pages it removed in October for sharing “inauthentic activity” were pulled for gaming its engagement metrics. > Though it remains unclear why it took Facebook so long to act against such prolific fakers — which the research suggests had been doping their metrics unchallenged on Facebook for up to five years.