A lot of the SWAC may be the some of the few FCS teams that play in large stadiums that are not too big. A lot of other FCS (and G5) schools have stadiums that are just too big.

It is my understanding that tickets sold, and not butts in the seats is the measure used by most schools. Some schools have people tailgating that never enter the stadium (which is crazy to me) or tickets sold and people don't show up.