I'm wondering what your evidence is for censorship on twitter? I routinely see the most vile, nasty things posted on Twitter - mostly from the right. If they are censoring, then they are doing a pretty bad job of it. If it's the Milo thing, they had to ban the jerk. He organized a nasty hate-filled Troll attack on another Twitter user. He did the organizing it on a different platform, got caught red-handed doing it and then threw a fit and called it censorship. Bull Dookey.
I know a little something about Twitter's ad model. Ad revenue is unquestionably tanking because of all the fake accounts and bots. When Twitter tells you that your ad will reach/has reached X# of eyeballs, you cannot trust that number. By some accounts, 20%+ of twitter accounts are fake. Nobody is paying to advertise to a fake account or bot. Jack is in a trap of his own making on it, too, since one of the primary metrics he has reported to his board is # of active accounts. He literally cannot give the ax to the fake accounts and bots withouth losing 20-25% of his "active accounts".