Yes, lots of organizations do the same but don`t call it KYC and people think that it is ok, i don`t know why. You left your email address and name for one resource, name and phone for another, id for one more organization. The result is that all your data in the internet and you need someone to compare it on all these resources. It takes some time, but the result will be like the stolen KYC.
There was a video I saw on social media where someone (a hacker) sent a link to his friend asking him to register a new account on some unknown platform, but the moment that guy clicked on that link, his friend (the hacker) gained access to his device, and he was seeing everything that the guy was doing on the phone. There are even other ways that someone can unknowingly lose their private details to hackers. Although, in terms of casino, it is still the choice of a gambler whether he or she wants to willingly give out their information to the casino or not, and for a gambler that doesn't want to give off their details, the best thing is to read the casino TOs and make sure that the casino is operating free from KYC requirements.