The two Iowa cases of State. Progressive Jackpot is the chance to become an instant millionaire. Though RTP (Return to Player) is an expected payback counted after a majority of gameplays, it is better to place a wager on highRTP value than on those with 80 or lower. Optimal play is a payback percentage based on a gambler using the optimal strategy in a skill-based slot machine game. Regulatory authority over class I gaming is vested exclusively in tribal governments and is not subject to igra's requirements. The odds are never about winning. "Woman sues Isle after she's denied 42 million from slot malfunction". For the album, see. These are usually triggered by 3 Scatter icons or more. With reel machines, the only way to win the maximum jackpot is to play the maximum number of coins (usually 3, sometimes 4, or even 5 coins per spin). The first Australian state to legalize this style of gambling was New South Wales in 1956 when they were made legal in all registered clubs in the state. Some of the most popular are the video poker machines, in which players hope to obtain a set of symbols corresponding to a winning poker hand.