They don't out right prohibit it (as far as I know), if they did I would take it off the social media button creator I have. Just don't push it too hard, for example I remember a ban here a while back where the model was really high up on the list (high enough to receive affiliate traffic) and put up an afk video that was a big onlyfans promotional video she made. I think she eventually got unbanned but its understandable that something like that would annoy CB and affiliates.