It's not like they don't have any age restrictions, the streamers that do that stuff have to mark their streams 18+ and add 'sexual themes' tags or they get banned. If chatters even imply their under 18 they must be banned or the streamer gets banned. Im pretty sure you cant see 18+ streams unless you tell the website you're 18, which would mean it's about as much of a gate that pornhub makes you jump through. They make gambling streams have the same rules but their tag says may contain gambling.