 It's one more reason to watch and enjoy sports. Big news. During games, promotions for sports books like FanDuel and DraftKings are everywhere. Bet $5 to get $200. A 2018 Supreme Court decision opened the door for states to legalize sports betting. Tantalized by new revenue, at the time of our report, 38 states had done just that. And Americans have spent more than a quarter of a trillion dollars sports betting.