You will face difficulties to make a withdrawal at 99% betting sites if you try to withdraw your deposited funds without placing any bets. You can't blame Cloudbet or any other casino for this. Casinos are really strict when it comes to money laundering activity. It just takes a few minutes to get the deposited funds in crypto casino account. You shouldn't access online casino if your decision changes within a few minutes gap. Your signature casino also has rollover requirements on deposit.
Maybe this license requirement is that you can not make a deposit and immediately withdraw all funds. Indeed, this is very similar to money laundering. In any case, a person can make a small deposit at the beginning and play small amounts to test the casino if he is not sure about it.