We have an update vendor in the store that gives out free updates for people who bought avatars. They work like the giftcards, they need the card to get the update. I manually give out cards. This is all explained in detail on the notecard that the vendor gives. Infact the vendor says "Click for details" or "Click for Info" or something like that. It doesn't say "Click to get avatar."
I'm just so tempted to write back all snarky like "Did you actually ... read ... the notecard it gave you?"