How Free Bets Push Gamblers Toward Risky Parlays

Sportsbooks use bonuses and free bets to change what people gamble on. A huge study looked at 547 million NFL bets from 2018 to 2023. Researchers found that parlay bets jumped big time after 2020. Parlays combine several bets into one. They pay more but hit less often. The house makes way more money on them. Bettors lose way more on average.

In 2021 sportsbooks started offering bonuses. Parlay share shot up. Free bets came in 2022 and profit boosts in 2023. Each new promo pushed the numbers higher. By 2023 parlay bets were 19 percentage points above the old normal. Even when you take out the actual promo bets the shift stays. It sits 17 points higher. The habit sticks.

The study checked the start of each NFL season. In normal years parlay betting dipped at kickoff. In promo years it spiked. That pattern happened every single time. The evidence lines up. Promos don't just make people bet more. They steer them toward the riskiest option. That matters for anyone watching gambling harms.

Young bettors might not see the trap. A free bet feels like a gift. But it often locks you into a parlay. The math is brutal. The more legs you add the worse your odds. Sportsbooks know this. They design promos to push you there. The data proves it works.

Regulators need to look past total betting volume. Product choice matters just as much. If promos funnel people into high loss bets that's a problem. The study shows a clear link. Promo periods equal parlay surges. The effect lasts beyond the promo itself. That's the real story.