More age levels than just Mature and Ages.
I couldn't tell if one stream in my personal experience long ago was supposed to be for young children and family audiences or if it was supposed to be for teen audiences.
I tried to be careful but I said one wrong thing, that would be considered rated T on a video game, and I got immediately thrown off and suspended from their twitch chat without giving a chance to explain or anything like that.
At the time there was no rule about the level of chat that was expected from the audience. Like for example you could request the song "Mother&$#+ the ***" by Willie D, Because it was a real song but you get ejected for requesting "troll songs" which I guess are song titles to songs that don't exist that violate the rules of "all audience broadcasts".
If certain types of TVMA speech is allowed and certain types isn't, there should be a more clear line about what is and isn't allowed.
For example I don't know if this is a universal twitch rule or just a good rule to keep a general but "don't hate on anyone either personally or by federally protected traits." In other words, dislike actions don't dislike the person.