But on the bright side, you won your bets and now you’re rich. One important caveat to note is that if you end up as a net-positive within the first 24 hours of betting, you won’t be credited with the $100 voucher. In short, bettors have the opportunity to take a big swing on MLB Opening Day wagers without any risk attached. This isn’t the only promotion FanDuel Sportsbook is running ahead of Opening Day, but it’s by far the most appealing one for existing users.