I don't know why any adult provider would stay, this "will they/won't they" will always be in the air and could be incompetently implemented the next time these idiots get some push-back from a bank or CC processor; or sell out; or get some new dipshit MBA on the board.
Their problem was that OnlyFans has an inherently Adult Only reputation. A YouTuber I watch (innocent car videos) got major pushback when he tried to use it like a Patrion for additional paid car content and had to apologize profusely and run from the platform.
But their other problem is that is the established reputation and that they were making a boat-load of money off it.
So I can see why/how an idiot made the decision--it really reminds me of watching Trump on that stage before he asked about internal sunlight and injecting bleach...
And I doubt they'll ever be the same again. I'd expect this to leave a bad taste in adult providers mouths and competitors will embrace them, while doing NOTHING to change the reputation of OnlyFans to get more non-adult users, and no chance in hell of IPO.