My brother was gambling in AC (Harrah's) & hit a large jackpot. The slot attendent came to him and asked, "You want CASH MONEY or LEAVE CREDITS ON MACHINE", that is the direct quote from the slot attendent.
I could only think that Harrahs would prefer someone to leave the credits on the machine and hope the player gives the $$$ back to the casino.
My brother said, I will take the "CASH MONEY". After being paid he ordered an adult beverage & put the jackpot in his room safe and quit gambling.