Uh, how do you think Pornhub accepts payments? Crypto has been the only option for paying for Pornhub Premium for several months now.
(I know this because I read a news article on it, just to be clear)
Edit
Sorry, ACH is also an option, my mistake. But Pornhub Premium's sign up page says they don't accept credit cards.
Edit: and it doesn't mention crypto.
It would be interesting to know what percentage of their users use each payment method.
That being said, it's getting better quite quickly and you're now seeing big tech players like Stripe enter the market.[1]
[1] - https://techcrunch.com/2021/10/13/payments-giant-stripe-says...
Crypto's terrible payment UX makes it practically unsuitable for porn companies because it makes everybody use centralized intermediary instead of using the crypto itself directly.