re: There is no solution to decreasing attendance/leaving early. Accept it.

For what it's worth, the experience outside of the game for me is a turn off because of how many commercials are offered over the PA. Instead of maximizing profit out of the fans, work on the fan experience and incenting fans to stay and they will. Have your civil engineering department study the post-game traffic flows and recommend improvements. Install a real-time traffic command to help people get out faster. Sell leftover hot dogs for $1 in Q4. Do giveaways on the way out instead of the way in. Make fans feel appreciated instead of taken for granted and they'll stay.