You mean casual players tip like that more than regular gamblers? I
have never witnessed this and always feel badly when "un-informed"
gamblers don't tip on a jackpot.
"In"formed gamblers know that tipping on jackpots is the quick way to
lose the money you are winning. Assuming $4 an hour, it would take
25 hours to win enough to tip a Franklin. This "In"formed gambler
tips 0.5% on jackpots greater than $1200. Of course, I don't play
machines that allow those jackpots. 