Two costs sit between a wallet and a casino balance, and only one of them is money.
The network fee is paid to the blockchain carrying the transfer, not to the operator. It is priced per transaction, from the size of the data and how busy the chain is at that moment, so it does not scale with the amount. Moving 50 GEL of coin and moving 5,000 GEL of coin cost the same, which makes the fee a rounding error on a large withdrawal and a real tax on a small one.
The second cost is paid in time. A transfer counts as settled once the network has built enough blocks on top of it, and every chain has its own block rhythm, so the floor under a deposit is set by the network rather than by the cashier.
Neither number promises a finished payout. The operator still approves a withdrawal before it is broadcast, and that approval queue, not the chain, is where a first cash-out usually waits.