They lose the home game and the revenue they could have made from that game, which includes ticket sales, concessions, media revenue, etc. On the other side of the ledger BYU gets the $2M from Tennessee. However, you also have to remember that BYU also gets an additional game that it can use. It would use that added inventory in a way that would generate additional revenue. It could bring in an FCS team or low-level FBS team for a body bag game that would generate additional revenue (even after paying for the body bag game), could use the spot for a neutral site payout, or could use it as half of a new H-H series that would generate additional revenue. So if you're analyzing just the financial impact there's more to it than just how much did Tennessee pay compared to how much BYU would have earned in that hypothetical Tennessee game.