Though I'd love to have season ticket, comitments and business only allows me to get to 7-9 games a season. I too will be hoping to buy ad hoc but am concerned how I'll be able to get a ticket with only 1,000 odd on sale each game. Also believe this smart card situation will make it that much harder. Will have to wait and see what transpires !!
Actually, in most cases I'd only have 1 (of my 2) spare and I'd be using the other so I'd sell on here, meet at the gate and re-collect the smartcard immediately after entry so no risk of not getting it back.
Since it's a card system, and as far as I'm aware there isn't an official scheme to allow me to transfer a match credit to someone else's card, I will only give it to someone who I know well enough to know if I can trust them to give me the card back.