On "withdrawal processing times", the answer starts with how a withdrawal moves. A withdrawal passes through several stages before it reaches the player, and each stage can hold it for a different reason. It is reviewed by the operator, checked against the account, sent through a payment processor and finally credited by the bank or wallet. Most delays players complain about sit in one of these stages, and the terms usually say which one.
Processing time depends on the method far more than on the operator. Electronic wallets and many crypto payments arrive within hours once the operator releases them. Payouts to a card can take several working days because they travel through the card network. Bank transfers vary with the banks involved and stop over weekends and public holidays. A quoted payout time normally covers only the operator's own step, so the full wait is that figure plus the time the chosen method takes.
Many operators pay a withdrawal back through the method used for the deposit, up to the amount deposited. The rule exists to stop money laundering, and it shapes the whole route: a deposit made by card may come back to that card, while winnings above the deposit travel by bank transfer. A method that accepts deposits but cannot receive payouts leaves the player waiting for a second route to be set up. The payments page usually lists which methods work in both directions.
Casinos set a minimum each withdrawal must reach, and a balance below that figure cannot leave the account by that method.
When the account and the receiving method use different currencies, a conversion adds another cost to the withdrawal.
Usually a photo document, a recent proof of address and sometimes a picture of the payment card with most digits covered; large sums can prompt a source of funds question.
Anti money laundering rules often send payouts back through the deposit method up to the amount deposited, with winnings above that going by bank transfer.
The casino may charge for some methods or frequent withdrawals, and the payment provider or bank may deduct its own fee on top.