Probably just clout, i doubt she is hurting for money (i doubt she is from a rich family but i'm sure she is a millionaire). Plenty of celebrities doesn't stop taking jobs even after becoming billionaires, content creators (OF or not) is no different.
Personally i think it's less about his audience and more about putting her name in the algorithm. A lot of people went viral by just having indirect interactions with him, being shipped as his "girlfriend" must be pushing her engagement to the moon. Last time she met him she couldn't tank the hate so she had to make her streams "Chinese Only" for a while, we'll see how it goes this time