If both bets are correct you would win approximately 2.5 to 1. The odds for parlays are different at different sports books. If you make a parlay with 10 teams you might get paid around 70 to 1 or better depending on the sports book. Winning one game is difficult enough and parlays are very difficult to win. There’s a reason the payouts are so high.
The National Football League is fully against any sort of legalization of sports betting, strongly protesting it as to not bring corruption into the game. On the other hand, the CEO of the International Cricket Council believe sports betting, in particular in India, should be legalized to curb illegal bookies where match fixing has occurred from nontransparent bookmakers. Many of the illegal proceeds also allegedly go to fund terror, drugs and other illegal activities.
One important assumption is that to be credited with a win, either team only needs to win by the minimum of the rules of the game, without regard to the margin of victory. This implies that teams in a winning position will not necessarily try to extend their margin—and more importantly, each team is only playing to win rather than to beat the point spread. This assumption does not necessarily hold in all situations. For example, at the end of a season, the total points scored by a team can affect future events such as playoff seeding and positioning for the amateur draft, and teams may "run up" the score in such situations. In virtually all sports, players and other on-field contributors are forbidden from being involved in sports betting and thus have no incentive to consider the point spread during play; any attempt to manipulate the outcome of a game for gambling purposes would be considered match fixing, and the penalty is typically a lifetime banishment from the sport, such is the lack of tolerance for gambling in sport.