Assume away folks...
Or...may be...it's the free guest pass that you get when you buy a 60 day game card. The one that doesn't give the holder anything for free when used. Since those were just on sale at Circuit City for $19.99, OP may have bought a few, like I did. OP may have thought he'd 'give back' to these boards by offering them, like I was thinking.
Nah, lets just assume OP is only posting for personal gain. It makes us feel so much better about ourselves, doesn't it?
Here is the fine print on the ones that I have:
How to use the 10-day guest pass:
1. Give a friend this guest pass key.
2. Loan your friend your Game CDs to install World of Warcraft on his or her machine (your friend will not need the CDs to play the game after installation).
3. Have your friend enter the Guest Pass Key when prompted during the installation process (the Key can only be used one).
4. Your friend will have 10 days of free access to World of Warcraft.
First ten (10) days free; retail version of game required thereafter
Internet connection required
Addition online fees apply with retail version of game
***end of fine print***
No where does it say you will get a free month if used, or any other benefit.
:disgust: