Was wondering if it wass possible that it was fraudulently used (we do have that thread about the guy who was recently arrested for trying to extort UA to expose a bug that gave him access to the codes) vs. being canceled.

OP...you seem to specify that it was canceled by the agent after being issued - was this speculation, or do you know this for a fact - and if so, how did you find this out?

fastair is also pretty knowledgeable, and his response seems like a very plausible scenario as well.