I'm not sure what you realistically expect, you either support a football club or you don't. Unfortunately the majority of people in Northampton don't support Northampton Town FC.
The Season Ticket numbers aren't going to fluctuate wildly unless we have a couple of seasons at the right end of League One and you may see more of an increase then or plummet toward the bottom of the conference and you'll see sales drop off.
As it is, we're in League 2, the average gate is up and given we've always very much sat in the Fourth tier of English football, 4-5000 people still come to watch each week and a good number travel around the country for away matches.
Or 2, or more.