Buying KYC accounts is something as an activity that directly supports organized crime and identity theft.
Moreover at any time your accounts could be claimed by the original ID holders and the platform could also deny your winnings.

So if you're found to be running under false ID at any time, the casino will surely take advantage of that. At best closing your account, or at worse deducting your balance and denying your winnings.

So yea, don't buy KYC accounts.