But could anyone tell me what is the big advantage of using a casino that accepts the Lightning Network?
To provide their customers with the option of instant deposits and withdrawals with a near-zero transaction fee.Because the lightning network, by definition, has a payment channel solely for you and for the casino, which removes the friction that a normal transaction has.
I ask this because I believe that those who bet on games of chance usually end up losing all their money on the site, hardly anyone can take something away, the player's impulse is always to spend more.
It's only the players side, the Lightning network does not care whether you lose money or not.
If the player happens to win a big prize and wants to withdraw, in most cases they will need to KYC first, if they haven't already, and then go through a manual check, which invalidates the speed advantage that LN gives them.
KYC is typically a
one-time process. And I doubt that there is an existing casino that asks its players for KYC every time they decided to withdraw their money.