2018 was the year of the SESTA/FOSTA law, which was ruinous to many sex workers. The sudden increase in adult entertainers being banned by Instagram and others is correct, but can entirely be explained by SESTA/FOSTA. You can read about it on Hacker News – here's a link to a Hacker News search about it[2]. The top result has 715 points, linking to an Electronic Freedom Frontier column about it, which begins: "The U.S. Senate just voted 97-2 to pass the Allow States and Victims to Fight Online Sex Trafficking Act (FOSTA, H.R. 1865), a bill that silences online speech by forcing Internet platforms to censor their users."
The lawsuit doesn't mention SESTA/FOSTA. It includes no evidence that OnlyFans or MyFreeCams users weren't affected by the SESTA/FOSTA crackdown, and I'm pretty sure they were. A friend of mine is successful on OnlyFans, and if I recall correctly her Instagram was banned and restated at least once. It's a standard occupational hazard for online adult entertainers.
The lawsuit only speculates that terrorist watchlists were used, just noting that they'd have been "ideal" for this: "One or more [Dangerous Individual and Organization] lists, combined with the GIFCT Shared Hash Database and URL sharing program, would have served as the ideal training data for a classifier/filtering tool to create this blacklisting effect, particularly in 2018 and 2019."
The talk of bribery is entirely speculative. After noting that OnlyFans has a Hong Kong office, and "The law of Hong Kong makes it very difficult to obtain discovery for a proceeding in a foreign court", they speculate "Radvinsky could have used either Smart Team International Business Limited Hong Kong or Fenix International Hong Kong to make the scheme-facilitating payments."
I don't read a lot of lawsuits so I don't know what's normal, but this all seems really off to me. Maybe the lawsuit only exists to cause bad press, so journalists can write pageview-harvesting lines like "OnlyFans bribed Meta to put porn stars on terror watchlist" and "OnlyFans squashed competitors in the online porn industry with the help of a bizarre scheme that bribed Meta employees to throw thousands of porn stars onto a terrorist watchlist", and then append "lawsuits" or "according to a group of explosive lawsuits".
[1] https://digitalcommons.law.scu.edu/cgi/viewcontent.cgi?artic...
[2] https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...