It's how all these crypto casinos do their marketing. They'll usually spot the bankroll entirely and let the player keep all or a percentage of the winnings. If they lose, they're not under any obligation to pay any of the money back and to the observer, it seems as if the balance is unlimited.

I've never been a fan of these sort of marketing initiatives. It gives players the false illusion of losses. When the balance is refilling constantly, a player's winnings is highlighted more than what they lose. It gives the impression that the odds might not be as bad as they usually are.

Even when the player discloses they're sponsored by the casino, how many viewers would understand that the balance is not legitimate funds the player puts in?