The bowl revenue is from TV revenue. It's gonna be there no matter where the games are played.
The TV revenue will be there regardless, the ticket revenue will be there regardless, but there are a lot of sponsors that put up big money that aren't advertised on TV. Businesses put up money to sponsor things not on TV, and lots of businesses put up 5 figures for not much else than some access and their name in small print somewhere. Of course they get tickets with all that stuff, so maybe it ends up not being as significant after you account for that.