Boise was making, on average, $1.8 million up front annually, plus bonuses, from 2013-15. It also said that they would be receiving an additional $1.1 million, starting in 2017. So right now they're earning $2.9 million yearly from TV.
I found another article that said that BYU made about $4.4 million from TV in 2016. I couldn't find other sources that said exactly how much was made from 2011-15.