I suggest reading T&C before making a deposit and hoping to hit big multipliers. Sometimes, casino platforms ask for KYC when a new user tries to withdraw big from a small deposit and they hope the impatient gambler will lose back all profit while the team checks for documents. I have never faced such issues but that is what I have heard on some shady casinos.
That's what every gambler should do before starting to deposit his money. But unfortunately, only a few gamblers want to take the time to read the rules because the rules page is too long. But it was for their own good because they could avoid making unintentional mistakes if they understood the rules well.
And when they get their big win, they will have no problem withdrawing the money even if the casino asks them to do KYC, they won't mind either because it's written in the casino. Only gamblers who underestimate the rules and think all the rules in every casino are the same will get into trouble.