These slots have prize pools that grow as more games are played, until eventually one person wins the jackpot, and resets the total prize pool back to a specific number. A jackpot slot is an online slot that features a larger, progressive jackpot prize than regular online slots. MGM Resorts has shut down some of its systems as a result of a “cybersecurity issue,” according to a company social media post on Monday. The MGM Grand Detroit is the best brick-and-mortar option for in-person sports betting, and BetMGM’s online sportsbook is the place to be if you want to place bets from anywhere within Michigan state limits.13:57 - Source: CNN. Sports RulesMichigan has three large commercial casinos and 23 tribal casinos, all permitted to offer sports betting to their customers.