Playing Max Bet on Progressive Machines: Progressive slot machines offer the potential for massive payouts, as a portion of each wager contributes to a cumulative jackpot that continues to grow until it's won. To be eligible for the full jackpot amount, it's usually necessary to bet the maximum number of credits per spin. While this may increase your overall risk, it also offers the chance to win life-changing sums of money if you're lucky enough to hit the jackpot.