Stuff their mouth with free food with the purchase of a ticket. "Golden Corral" comes to mid-major FBS.
https://www.sbnation.com/college-football/2018/6/21/17488634/attendance-ncaa-unlv-utep-free-food
https://www.sbnation.com/college-football/2018/6/21/17488634/attendance-ncaa-unlv-utep-free-food