Interesting, the news just reported only 6,000 sold through the University. Maybe people are catching on to the fact that the University seats are not the best. Could also be the Snowbirds and transplants buying them up.
When figuring in their number the Insight figures in 11,000 for each school or 22,000 total because what the University doesn't sell they eat and the Insight Bowl still counts as sold.
So taking that 22,000 out of the total that would mean the Insight Bowl has directly sold around 28,000 themselves, they may say in the end that they sold 55,000 tickets but no way will there be that many people at the game.