I don't think I quite understand the suggestion. Are you suggesting that we can pay to increase attendance once a season? If so, I don't really see the point...just seems like a lot of coding to implement something for only once a season.
Also the residual affect you mentioned, would that be an increase in attendance over the next game or 2? Or would it be a decreased attendance?
Sorry but I don't think it is necessary or that it would add much to the game.