Supply and Demand.....they will be able to..... This is just going to be a weird season, some will see it as a "competitive disadvantage" for some teams to have 13,000 fans and others to have 0. The NFL is going to generate every dollar they can in revenue even if there is some perceived imbalance. You can pump in 80db or something anyway. Not sure how much 13,000 fans can really influence anything one way or the other.