Have you ever consider that casinos intentionally delay someone's payout specially if this is huge money? Reason being is that,
The longer the withdrawal is pending, the higher the chance the player cancels it and plays again.
And also, suddenly KYC is being asked after that big win, delaying it even further to the point that some gamblers be frustrated and just play their winnings until they lose everything back to the casino?
I guess it is a marketing strategy, and a very wrong one that shouldn't be encouraged in the gambling community. Because it is issues like this that spoils the name of a casino into it been tapped "scam". Because judging by how far it's always hard to win a game while gambling, and you luckily eventually won, and time to withdraw the casino starts to frustrate you, there is absolutely nothing so painful than this. And if you watch carefully, you will noticed that the majority of casino who does such act are always New casinos, simply because maybe they don't have huge capital and tries to delay, or intentionally don't just want to pay the winner if the amount won is huge. Hence, a more reason why it's always good to prioritize reputable casinos that have huge budgets and won't mind paying gamblers who win millions of dollars even twice a day or week.