I think their business model is like a gym - they need people making an effort to cancel, not to renew... Crypto works for one-time payments, but it sucks for recurring transactions. Too much hassle to pay every month, people would just give up.
Their reasoning was that you can't handle recurring payments without holding a lot of personal data.
Perhaps porn sites that want to offer inter-species furry porn should bite the bullet and only accept one-off payments, just so they can make effective use of crypto.
With micropayments, the business model becomes (quite literally) pay-per-view.
> it sucks for recurring transactions.
The UX is bad at the moment, but with crypto there is this idea of "streaming payments", which work very well as a substitute for subscriptions. Basically, you make only one initial transaction to set up the "subscription" with a locked deposit. On every block (or on every X seconds if you are doing off-chain), a small transfer is made. You only pay gas if you need to "top-up" the balance or when you want to close the stream.
If your quota has insufficient Ether or you've deauthorized the contract, your "subscription" will be cancelled automatically.
All on-chain. This should be the way to go.
It’s not ideal for that type of derelict subscription business model (e.g. the gym), but neither are prepaid debit cards or virtual cards with predetermined spending limits, and they probably already contend with those.