[Lockbox]

The average NFL stadium cost about $250 million in public funding

http://www.marketwatch.com/story/this-is-how-your-tax-dollars-paid-for-the-super-bowl-2015-01-29

[God luvs America]

and there are 10 NFL games a year (8 regular season/2 pre-season) and the stadiums are used for college games, soccer games, concerts, tractor pulls, monster trucks, etc, etc, etc, etc...

F1 is once a year at COTA...