Don't force season ticket purchasers to buy a playoff ticket, just give the option. Heck, even make it clear that they can still purchase their normal seat for the playoff game after UND has already made it, but that the pre-purchase can help UND in its bid. Seems like a win/win to me, but you're probably right.
Attendance Thanksgiving weekend is tough to gamble on. I know I wouldn't have made it, but probably would've bought a ticket as part of my season tickets anyway.
REA handles season tickets. I say make them earn their 52%