A private company running the most popular iteration of a particular service isn’t a monopoly.

Twitch’s Rules of Conduct don’t limit themselves to AO games, and neither does their list of banned games.

Just like how the developer has the freedom to put whatever he wants to in his game, Twitch is free to keep whatever they want from appearing on their service. Just because they’re the largest and most visible service doesn’t mean that they’re a public accommodation - they’re a private entity and they’re free to keep…

If he is willing to make changes to his game to get it on Twitch, doesn’t sound like he cares that much about censorship. It just sounds more like Twitch doesn’t want sexually suggestive games that feature lots of panties and nudity on their site, and this game has too much of it.