Charging students has nothing to do with supply and demand. Before moving into their respective new buildings more people attended, on average, football games than hockey games. It is all about making money. As of right now UND/Alerus makes $0 from students, and if they only 1,000 paid $5 for these seven home games, that is a good amount of money.
The Alerus has one of the best atmosphere in Division 2. Why screw that up? I remember the old Engelstad having one of the best atmospheres in Division 1, but they moved into a new building and started charging students. They didn't seem to care about the atmosphere.
I also propose having only one section in the lower part of the Alerus and moving the rest of the student sections to the "upper" part, therefore allowing the season ticket holders to have better seats which will result in more money as seen in Ralph Engelstad Arena