Mindgeek lobbied hard for this. They (owners of Pornhub etc) are the government's approved age verifiers, so are in theory now in charge of access to all the other porn sites.
Aaand of course. What else could it be, but the economic power moving to write laws to benefit themselves, stifle competition, overrule the will of the people, and impose their rules on all of us.
wow... just wow...
They also give away free premium memberships to a degree that will shock even Audible, probably because a known user is worth so much more.