Do they draw fans? Do they improve the business value? Are they required to provide a service for the business?
Then they should be paid appropriately.
Yep. So do strippers.
Do they improve the business value?
Dubious. If they do, it's for reasons that have nothing to do with football.
Are they required to provide a service for the business?
Required? Hell no. They're shake-and-shimmy decorations, nothing more.
There are plenty of exhibitionist women who would -- and DO -- work for free.