[quote name='storino03']Really? The ones with the expiration date don't work. If anyone has any old Xbox Original cards, would you send me one so I can try it? I've tried 3 of them and they don't work for me.[/QUOTE]
The issue is that these codes will work with original xbox live accounts that were migrated over to the xbox 360. A new customer to MS products buying an xbox 360 wont be able to use this with their xbox live account. That's pretty much the only catch to these codes, and why some xbox 360 users can use them, and others cant. The only other catch would probably be region of where the code came from. Like me for example I just recieved a japanese original xbox game. Guilty Gear Isuka to be exact. This had a 2 month card in it, but I dont use xbox live so I have no idea if this would work, but someone with an xbox 360 with a migrated original xbox live subscription may be able to have this successfully redeem for them.
For a clue to why I'm saying the above.....Take a look at all the CAGs in this thread, and take note of their join dates. The older ones who had codes work joined this site while the original xbox was still out, and they most likely had accounts on it that they migrated to their 360's when that console released. The newer users most likely were adopters of the 360 only, and never had a original xbox subscription to migrate to the 360.