The game is in Texas. It's not like it's a bowl game. They are going to get a bowl in 2 to 4 weeks so most fans have to choose between traveling to one or the other. It's not like this is a drive-able game during the Christmas break. Students can't do a game like this during the school year too.
Unless they win the game, the AAC Championship Game is against a better opponent and a better location than at least one of their bowls. Here are the available bowls for the AAC:
12/19 Cure Bowl, Orlando (vs Sun Belt, probably Georgia Southern)
12/22 Boca Raton Bowl, Boca Raton (vs MAC, might be against one of the MAC Championship Game participants)
12/24 Hawaii Bowl, Honolulu (vs MWC)
12/26 St. Petersburg Bowl, St. Petersburg (vs C-USA)
12/30 Birmingham Bowl, Birmingham (vs SEC, possibly vs 6-6 Auburn)
NOTE:
USF is playing against a C-USA opponent in the Miami Beach Bowl on 12/21
Navy is playing against an ACC opponent in the Military Bowl on 12/28