Just want to add that integration for CCbill is probably a good idea. There's a major crackdown of adult content on the internet right now. I was recently working with members of my guild who create handmade adult products on an advice article on what to do, since they got kicked off of Etsy last week - how to create their own stores so they can continue to sell online.

Payment processing is HORRIBLE if you sell any kind of adult products or services. Stripe does not allow payments for any kind of adult content. People use Stripe, but it's only a matter of time until they get discovered and shut down. Paypal allows it only if you ask first and get the right rep to give you the go-ahead - and that's the experience of makers - I don't know what would happen if someone running an OnlyFans alternative asked for permission, Paypal might tell them an automatic no. The only payment processor that reliably permits people to sell adult products/services is CCBill.