>>7084804You ever been to an event? They always open more seats just before the show.
Also any single seats left go on sale as well since Ticketmaster and other sites don't let you buy single seats. Some times depending on where you want to sit they won't sell them. I went to the sold out Detroit show and they wouldn't let me get a seat by myself unless it was the only one left in the row. It was in certain sections only that they did this, mostly the less expensive seats.