Several adult friendly platforms have come and gone. Many of them very profitable and self sustaining. They all eventually get screwed by inability to process payments.

And when people try to create their own payment methods not subject to arbitrary morality rules, the full weight of the existing banking system comes down hard and strangles them in the cradle.

We could absolutely have safe, profitable, self sustaining adult friendly spaces, but the powers that be don't want that to exist and work hard to undermine that from every possible angle.

It's really no different than all those efforts to ban local fiber ISP coops or how abortion clinics get shut down by arbitrary full hospital regulations because they couldn't ban them legally.