i read that there is a soft cap on attendance @ 20,000
but just like the potential cap u can go over it but it would be hard but it does explain how teams get 21,000
examples
if there wasnt a cap/but there is a cap
18,000 18,000
19,000 19,000
20,000 20,000
21,000 20,333
22,000 20,666
23,000 21,000
24,000 21,333
& remember it is getting harder & harder to find more fans willing to pay to come as well