I think the most of us heard news like "someone was catch selling private data" or "the employee of company sold clients data". So it means that someone need it and ready to pay for it.
If it is possible, i try don`t share my data, but today reality tells us that the all withdrawal operation requires phone number or email at least + bank card if you withdraw fiat or your cryptocurrency address. Without KYC you can use fake data - virtual card, phone number, name. They can sell it, but i think that you mustn`t care about it.
I myself have never experienced this, in terms of gambling I have never experienced my account being stolen or sold. But what I've seen happen to my friend is that his account was locked when he managed to get a big win. Does that constitute account theft? What do you think about the case that happened to my friend? Is it possible that this happened because he filled out some of the requirements carelessly like I did by only filling in the important parts, namely the account name and account number?
Apart from that, when you get a win and want to withdraw it, of course we need various aspects or things that must be fulfilled, but as long as I've been gambling, I feel like I've never experienced a fatal bad incident, maybe it's just that the withdrawal time isn't too fast, even though I sometimes felt annoyed but in the end my withdrawal was approved.
No. In such situation your account may be frozen until KYC. If you got ban it may be if casinos` security decide you cheated or if your data wasn`t true. May be something else, i can`t say right now.
Any way your friend has to write ticket to support to get some more information. Or, if it has ANN thread - write in such thread and wait an answer from the casino representative.