Sportsbooks have a tremendous advantage on parlays.
You can bet SGPs in many sports but they're especially popular for primetime NFL and NBA games, because it gives you rooting interest in almost every play. At bet365, you can even parlay a bunch of different same game parlays. At many books, you can add player props, game props, winning margins. But most bettors are looking to tie a bunch of props together to create a lottery payout - sometimes north of 50-1, or even 250-1. Same game parlays can be as small as two bets, like Chiefs -4 and over 52.5 at something like +200. At BetRivers, 20% of all NFL bets have been SGPs. And half of all new users place one in their first week. Our friends at SportsHandle reported that half of FanDuel's active users who bet the NFL in 2021 have also bet an SGP. They called it the Same Game Parlay, it became wildly popular, and every major sportsbook launched its own version (some under different names, since FanDuel is trying to trademark same game parlay). Then magically in 2019, FanDuel began letting bettors create parlays on the same game and started marketing it like crazy. If one happens, the other is more likely, so they didn't want you to get the full multiplier a parlay offers. Many 21st-century sportsbooks stopped letting you parlay two bets from the same game, like a point spread and the over together, because those bets could be correlated.
