That’s because the mafia behind the casinos is already assembling hit teams to go make an example of these hackers.
The idea that they're paying because a hit squad is about to drop in, murder them all and get the money back is pure fantasy. If modern casinos figure out who did this they'll forward it to law enforcement. In all likelihood they have no idea, though.
If there's any evidence that these casinos still commit murder like that I'm all ears.