I worked for an online casino in the past. What they do is a standard in the industry. The company I worked for was a small startup and onwed hundreds of domains, mostly just to protect the brand, 98% of which redirected to the main domain, with a few serving slightly different sites for different jurisdictions (e.g. Ontario regulations require that everything happens under a .ca domain). The "blocking evasion" doesn't require CF to do anything, besides forcing the customer to block traffic from certain countries (the ones where you are suspected to evade the block). At this point - if the casino is really operating in the black or gray markets - they can just set ingress to their site outside CF for those countries only if they really wanted. I worked also for a company who was doing this to allow traffic from Russia, changing every day mirrors (and they had an IT department of maybe 20, it was a joke), and Russia was the main market for them.

If what is told in the article is true - I.e. 95% of the traffic was through the main website - then it doesn't look like they were really doing this sort of evading deliberately, considering that in that 5% you have all your alternative TLDs plus the traffic from gray/black markets. Having hundreds of domains and some small percentage of traffic from black markets is something that just happens, it's different from continuously registering new domains for providing access where the previous ones got DNS blocked (this is domain block). It doesn't seem this is what they were doing based on the article, and if they were, then CF emails didn't mention it, which is insane.

Obviously we don't know the full story, so everything has to he taken with a grain of salt.