I don’t know if these things are still valid, but attendance and stadium size used to matter.
The East side was extended to create 31K an FBS requirement.
Another FBS requirement was 15K in attendance. That’s when the Tulane attendance was lampooned. They’d report tickets sold vs actual attendance.
Neither of these requirements seem to matter anymore.
Attendance by sold might have some effect on the bonds being sold for the projects. But that seems to be based on other things.