I thought some recent prior years, if a student attended all of the games, they received either all or some of their season ticket money back. That might be good incentive, or some other incentives to increase attendance.
I really do not think the cost impacts attendance; most students I am sure parents are paying the bill and doubt another $150 affects the overall bottom line for tuition and fees.
My nephew is a student at SHU, when he was in grammar school and high school he attended almost every game with his family. Became a student at SHU and missed many games last season. When asked him or his parents why he didn't attend, answers would be had class, too much work, came home for weekend or just a shrug with no real answer.