Why wasn't TCU-Utah on CBS?

Much was made of the TCU/Utah game this week. After all, it is possibly the only time top five teams are going to match up for the rest of the season, and it was a game that would eliminate one non-AQ school from a shot at the BCS altogether. But one of the biggest stories heading into Saturday was that few people were going to get to see the game at all, no matter how much they cared. The game was broadcast on CBS College Sports Network, a channel I and 49% of the country get but usually have to pay extra for. Turns out the Mountain West doesn’t have a television deal with any of the major networks, so it’s not like ESPN could just show the game once it turned out it was a huge matchup. But why didn’t CBS move the game to it’s main, national network instead of this random sports channel subsidiary? That way tons of people would get to see the game and CBS could have gone back-to-back with TCU/UTah and then LSU/Alabama. Sounds like a big day for the rating...