It's not really a good point. Yes it's more difficult, but that doesn't exempt them from complying. And they've made basically zero effort to comply.

You could argue quite convincingly that the explosion of adult content sites is due largely to evading regulation and reaching a wider (ie: illegal) audience.

They were never intended to comply. They were intended to pull their offering.

What are you talking about though? I don’t care one way or another whether the porn company makes money, fuck em. The problem is if your law doesn’t prevent kids from watching porn but instead pushes them to shadier sites.