They're not really an anonymous casino since their TOS clearly states KYC. But sometimes, casinos use that as a marketing tactic to attract more gamblers and stand out from the competition. I’m sure many gamblers are aware of this, and these days, KYC has become pretty standard. However, if a casino isn’t strict in enforcing it, that definitely makes it more appealing.
And that is the type of advertising that makes me hate this type of business, the casinos that do that not only deceive, they play with people's beliefs and that is why they are often labeled as scammers, because for me scamming is not only about money, it is also about information, a casino that does this at least I do not play there.
Not only in casinos, there are many businesses that tell you and offer you one thing and then they come out with other things, what they gain is that one spreads the word and they do not progress and go bankrupt, they can deceive a few, but those few make sure that no one else falls for it again.