What exactly are those requirements, and how is there "no way" for Pornhub to satisfy what "the legislation demands"?
I ask because I'm tired of seeing (in general, not just PornHub) deceptive rephrasing of "we don't want to" as "it's impossible for us to." Companies too often take the attitude that they're entitled to their business model or being able to push externalities onto others, but that's obnoxious BS propaganda.
Edit: So according to the OP, the law "requires [PornHub] to verify the age of all visitors using a government-issued ID or 'public or private transactional data.'" I'm pretty sure they've already implemented that to verify the identify of performers (https://help.pornhub.com/hc/en-us/articles/19159382668435-Tr...), after much kicking and screaming, in the wake of that Nicholas Kristof article a few years ago. So a pretty straightforward implementation would be to require user accounts to view (at least for Texas), push users through PornHub's existing age verification flow, then give them access.