At Slot Machines, Free Play is promotional free play that allows you to play slot or video poker machines for free. Once you cycle through the promotional value, the remaining amount can be cashed out.
At Table Games Free Play is issued as Promotional Chips that can be used at even money bet games like Blackjack. Promotional chips are for one bet resolved only. Win or lose, the promotional chip is taken from the player after the bet is resolved. If the player wins, he or she keeps the winnings only. On a tie, the player keeps the chip.