I don't know how many generic tickets Gencon sells, but I feel like every year I have too many generic tickets since I fear wanting to go to an event but not having enough, knowing it would take too long waiting in line to grab some if I only have an hour (or less) between events.
There are ticket dispensers that accept cash/coin/credit card for only a few thousand dollars. Even if I had to pay 1.10/ticket instead of 1.00/ticket, I would pay for the convenience of not having to wait in line. I understand they wouldn't be tied to my account, but that's not always a bad thing when I'm in a hurry and want to buy tickets for my friends.
Just a thought. For all I know, Gencon doesn't sell enough generics to make up for the cost (plus the storage inconvenience).