Every week, thousands of bettors place small dollar parlays in hopes of landing a massive payday by having the perfect week. Sportsbooks clean up on parlays, as they account for the highest percentage hold of any bet on the board, which is why they’re so happy to promote when bettors win, even when it’s a $10 bet that nets $80,000, because on the whole, they still win a ton on people’s dreams of cashing in big time.