Demand is simply down. There were empty seats around me for KU!
People lock up season tickets since they always get "sold out". But then they don't go to weeknight and/or non-con games. I do this too, and have eaten 5 games this year. So plenty of tix are available. We aren't at capacity like it used to be, unfortunately. And this is not related to the recent swoon, it was like this the past couple years too.
I've had a hard time selling them, or even giving away at times. Three times I needed a 3rd ticket, I scalped for $20 out front, paid $20 on CF, and got a freebie (thanks, you know who you are!)
I don't think they can jack up prices or donations, or threaten to re-seat everyone. A fair amount of people (esp those driving in from a distance) would just not renew. I likely wouldn't, I'd just pick a handful of games and it would cost less overall, even at more $ per game.