Basically she just posts some selfies before she goes live every day. Basic instagram stuff, and of course with the fanhouse watermarks and low res. Been subbed for about a week I think (out of curiosity) and haven't gotten any DMs or anything, so she probably doesn't do more in there. Not really worth anything, but I guess it's still more than giving her 5 dollars on Twitch.
Fanhouse, Patreon, Fanfix, SoClose, and sites like that are Onlyfans-Lite. It's for girls who want to do Onlyfans but don't want the stigma of Onlyfans/Fansly. Even if it's not Onlyfans, dudes subbing to you are still going to want to see tits and ass. Something better than Instagram. And when you don't provide, expect hate.