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.
Every casino did this, it's just a matter with how much you withdraw.
For a big casino, they might think deposit $10 and withdrawed $1,000 is still fine because $9,990 isn't a big lost for them because they've make more money than such amount.
But for a small casino, they might think $9,990 is a big lost for them because they only earn $100-$300 everyday, which mean they're need to work without getting any profit for 1-3 months. This make the casino will ask KYC and giving numerous excuse in order to not pay the winnings.