I parked there twice this year with no issues, so either they haven't been ticketing or I got really lucky?
I have had to miss some games this year, so my only time trying to park at Towers so far was the Oklahoma game. I arrived around 20 minutes prior to kickoff and found 61A and 61B blocked off. After driving around side streets for about 10 minutes and not finding a spot, I ended up coming back and parked in an open spot 61G (small narrow lot west of the Tower building).
We started walking toward JTS, and (at this time almost kickoff time) we saw the ISU parking truck leaving 61A/B and removing the barricade.

Walking through there were tons of available spots. The whole ordeal caused us to miss the first few minutes of the game.
My dad went to the Akron game and was there an hour or so before kickoff and he said 61A/B was blocked off then too.
I understand students need spots to move their cars, but I don't get the sudden change when I've been parking there for years with no issues (and plenty of extra parking spots).