[noduerme]

Sportsbooks don't make money by betting against the gamblers. They make money by facilitating betting between gamblers on both sides of the game. Their goal isn't to win, it's to set a line that'll attract an even amount of money on both sides, and keep a percentage for the service. So lines (the final scores you're betting on) move over time as the public piles on one side or another of a bet, and that there's often value in going the other way if you know enough about what a line should be.