I think a lot of the censorship problems would be resolved if they just shut the bots off and relied on user flagging. Does that require a lot more people? Sure. But the long-run result would be far more people would use and trust these networks (covering the revenue of hiring moderators). I know I'd be a lot happier if there was a thinking human deciding my fate than a random script that only a few people know the inner-workings of.
As-is, it seems like a lot of these social networks are just shooting themselves in the foot just to avoid costs and get a false sense of control over the problem.