I don’t really find this surprising! If we can expect social networking to allow groups of like minded individuals to find eachother and collaborate on hobbies, businesses and other benign shared interests - it stands to reason that the same would apply to violent and other anti-state interests as well.

The question that then follows is if suppressing that content worked so well, how much (and what kind of) other content was suppressed for being counter to the interests of the investors and administrators of these social networks?