@matthew_d_green I really don't like the long-term implications for the reasons you say.
But in the short term, sex workers organizations have been railing against sites like PornHub for years because of how little money actually gets back to them. It's going to be a boon for subscription sites which (again, I'm following what the workers themselves here say) apparently get much more income to them.
Because in some of these jurisdictions, credit card age verification is sufficient.
The North Carolina law only requires age identification without specifying how. Other jurisdictions are far more prescriptive. In the past, credit cards have passed legal tests for reasonable precaution. Most legal observers in NC say it's unclear if that will be sufficient.