This is no good. You don't tease both teams in the same game, the conditional probability KILLS you. If Team A wins the teaser, team B teaser Bet's chance to win then free falls.
By example, if each quadrant has a 1/4 chance to fall (Qua drant one is Team A kills em, Quad 2 Team A covers by less than 6, Quad 3 Team B covers by less than 6, quad 4 team B kills em).
Each teaser leg is a great 75%
BUT.........the same way teaser is only 50%.
More evidence of how bad these are is that at the Wynn Las Vegas you will get plus money on these same game teasers in their props.
Seven years ago i remember literally SCREAMING at Andy Iskoe about how Horrific these are.