Ah, so you mean the Chocobo Shirt is Adoulin content, then? I see, thanks. None of the other replies I've seen mentioned anything about the reward codes before, you see - only textbook answers about the product key.

I think a more informative error message would probably have been useful, though. "This code has expired" means just about the opposite of "This code is not yet active/usable." But alas, hindsight is 20/20, unlike its more useful sibling... I'll chalk it up to PS2 limitations, I guess.

But that does bring up another question: if the Chocobo Shirt code isn't usable until Adoulin releases either, why is it that we can get those codes, and not the product keys?