It does sound unethical when members have fulfilled requirements such as KYC or others, and when they want to make a withdrawal they are advised to reapply for KYC, which seems ridiculous. But on the other hand, those who act as hosts can of course do whatever they want, including asking members to submit their KYC again. Even though it doesn't make sense to the members, when the host is like that then I think the members won't be able to do anything but follow the host's orders.
In a way they make them bow their heads because it is money that they are going to get, so this can be beneficial from the point of view that it will always lead to a better way of doing things, of course, I am one of the people who does not does everything in case I left my KYC, I always try to have my KYC in the casinos that are 100% trustworthy, like stake.com, bitcasino.io, sportsbet.io, where normally you have to complete the KYC once and not They make so much trouble, I know that when there are larger withdrawals they do have a more rigorous KYC but this is within the casino rules, even so they are reliable casinos and that is what gives more security.
Honestly, dude, after all, KYC is not a big deal if the casino has a good reputation and is a long-time player in the crypto space. It's just that there are others who don't want KYC and are sensitive to their data privacy. And that is their right, too.
Now, if they initially registered with the casino because they knew there was no KYC, so they made a deposit and came to the point where they won a large amount of money playing gambling, and suddenly they are required to submit KYC, there is nothing they can do or choose if they have funds in the gambling platform but to still submit. Because they only have two choices: to submit a KYC to release the winning prize to the casino or not to release the winning prize to the casino? That's all easy to do, right?