According to this pornhub is blocked in 25 states including Texas.
Pornhub itself is doing the blocking; it uses geolocation and denies services to IP addresses from jurisdictions with age verification laws. The laws are usually not structured so as to require a third party such as an ISP to block noncompliant sites; instead, the governments of the states with those laws can sue the porn sites and their service providers (Verisign in the case of .com domains).
I used the language of the link.
> The explicit tube site Pornhub is now blocked in 25 U.S. states
I had assumed that the states were blocking Pornhub but reading between the lines in the linked article it does imply it's not the states are not applying technical blocks.
It's a bad metaphor. I'm just saying they don't have to directly say what it is they want these sites to do to coerce them to do it.
This seems like a reasonable ask and a reasonable response to me, so I don't understand who the bad guy is supposed to be here.