1. Poker, where you’re playing against other patrons and not against the casino
2. Cheating
Apparently Stephen Paddock was wealthy.
Gunman Stephen Paddock was an accountant who played $100-a-hand-poker
...Eric Paddock told CNN on Monday his brother had worked as an accountant and had plenty of money. "He was a wealthy guy playing video poker... on cruises," he said, adding that his brother could afford anything he wanted and played $100-a-hand poker. Authorities say Stephen Paddock, 64, lived within easy driving distance of Las Vegas, had a pilot's license and had legally purchased some guns...
Video poker is not poker. Video poker is slot machine playing.
However, mention is made of $100-poker hands. That’s live poker. Maybe this turd was very good at live poker and maybe that’s how he supported himself.