They had a ban in place for years and it worked. They have a ban for non kyc cryto markets. It is easy to lean on payment processors and stop 90% of it.
Yeah you just say that customers lost their money illegally, make the companies give the lost money back and watch them implement know-your-customer real quick, all on their own.
Yeah, they had no problem banning online poker that way. Annoying these garbage sports betting sites are allowed now but you still can't play online poker outside of a few states.