If it's FSU fans that are doing anything at all to boost sales, I still count that a win because that means the rest of the tickets that they will not use will be placed on the market for a potential discount, making it easy for non-season ticket holders to find cheap tickets. In addition, many FSU fans I know will happily attend the games and cheer for the Bulls, as they don't see us as a rival or a threat.
That being said, I just think the increase is from a combination of an ever-increasing student body and alumni base, low cost, high expectations, and Skip Holtz being able to sell this program to the community.