Progressive slot machines and video poker games produce some of the larges jackpots in the world. In fact, most of the biggest online jackpots ever were won by people playing progressive jackpots like Microgaming's Mega Moolah. Unfortunately, progressive jackpot machines don't get "hot" as they don't work on a payout-percentage basis. All you can do is cross your fingers (and toes!) and spin the reels.