By Frankie Taddeo Our experts like the Cowboys and Vikings to cover the spread in Week 18. Week 18 signifies the final chance to win free money in SI Sportsbook’s free Perfect 10 NFL betting contest for the 2022-23 season! SI Sportsbook has paid out five-figures several times this season and will try to give away more money. The Perfect 10 contest requires 10 selections against the spread (ATS) for a chance at a share of a $10,000 prize. Every contestant who picks at least six games right will be awarded consolation prizes in the form of free bets. Sunday’s Perfect 10 contest finds a card list…