That's how I got mine.....someone didn't renew for whatever reason, and I now I pay yearly. I wouldn't be surprised if that's true for a large percentage of the chairbacks nowadays.
Anyway, as someone who tried to sell my tickets this season, I can say there's no real demand there....I only got one offer that wasn't totally insulting, and that one didn't work out, either.
I ended up offering tickets for sale individually, and have managed to sell them for 4 games so far, including today. If you want to see butts in the stands, we'll have to start winning....that's the way it always works with the State fanbase.