Dude there’s a difference between saying “we won’t host violent videos so some trolls can get off” and “we’re going to police every action”.
People like you who will inevitably bring up the “slippery slope” argument seem to ignore a) twitch etc are private companies and you can’t force speech on them, and b) there’s is no difference between threatening or broadcasting violence against people and having an unpopular opinion.
Unpopular opinion: America should be communist.
Opinion that might get you banned: “go out & beat up or murder people who disagree with me”
Sure but Twitch is here suing people in a real court. It's not about whether Twitch is forced to host your speech or whatever. Here the government is getting involved.
To get people off their platform they have to serve a restraining order. If someone is hiding their identity the only way to get it is through the courts. For obvious reasons ISPs don’t give that info out to anyone who asks.
Doing that costs them a lot of money, so why shouldn’t they also seek to recover those costs?