It's pretty simple, the more you win, the more tickets you sell, contributions you collect, etc. Lose, and the numbers go in the opposite direction.
Once CPJ left, absolutely everybody expected us to do poorly the following season, so it's not surprising that everything went down. Even though everyone knew the switch to a non-TO scheme would take time, people still want to see wins, and will pull back if they don't expect them. This isn't the Geoff Collins effect, this is something that has been around since the dawn of ticketed sporting events.
Had we started winning in the second or third season, you would have seen the numbers go up. But of course we didn't, so they kept going down, and things are pretty dire right now. Expect a whole lot of empty seats in the coming season.