In this day and age giant stadiums aren’t not that big of a deal anymore.
It’s the conference media right games that pays the bills, a number of universities are talking about lowering the attendance at games.
Every game is on TV, conference revenue is huge and getting bigger, especially if you are in a power 5 conference, which CU is.
They have the Alumni base to generate plenty of revenue thru boosters and can compete with anyone.
Sports betting is the big thing now.