I do not think it means what you think it means

I was contemplating going to a Judas Priest show coming to my area. Ticketmaster shows the seating chart of the venue with the areas blocked by the stage greyed out and labeled “unavailable”. For the Izod Center (E. Rutherford) show over half of the arena seating is not available.

That’s just crazy – and also misleading. Makes you wonder about ‘sold out’ shows…