I've always assumed that there are many ticket holders that do not "donate" any more than the minimum that they have to get the seats they want, but maybe my assumptions are based more upon my personal expectations of wanting something for my money and the more money I spend the higher my expectations for something nicer (in this case more desirable seats).
Knowing there might be seats that are grandfathered in that don't require the minimum donation made me wonder if it can contribute to some of the lower attendance when the team's not doing well because the ticket holder doesn't have as much invested.
Oh, by the way knapplc, I'd use some Pappy's seasoning if I was eating my tickets and make them taste a little closer to some of that good Fresno tri-tip.