This highlights the difference between paying with bitcoin and paying with a credit card. When you pay with bitcoin the merchant doesn't get the private key to your wallet. When you pay with a credit card you give the private key (the cc number) to the merchant.
As industry likes to chant the mantra "adapt or die" referring to (free) tube site model which is killing the industry, it will need to adapt new business models around Bitcoin.
Still, there are many avenues a site could adopt bitcoins - pay per view, pay per minute, it's even doable with 'subscriptions' - when user logs in when subscription expired just provide new bitcoin address to renew membership. also small token payments - pay per clip, tips, pay for day or several days accesses. The positive note that customers will feel more confident paying with bitcoins - no charge shown on cc statement so less likely to get wife mad , no rebills (if site's content is great loyal member will be coming back for more anyway), no insane charges with cross-sells to other sites - the practice that used by some industry members which is killing users confidence in online adult entertainment when it's not fully disclosed. For site operators, no insane high risk transaction fees from billing companies, which means smaller guys can enter and monetize their good quality content without processing hassle. At the end it could encourage healthier competition and improve quality of content and service in my view.