Pornhub is only pulling out to punish the states for trying to stand up to them. In classic American monopoly fashion they go on the attack as soon as any legislation targets them.
Pornhub claims the reason is because they dont to collect government ID but Pornhub collects user data and understands who their customers are. Adding government ID to their data would hardly be anymore of a privacy invasion and it's not like they are forced to store it.