only 1 per amazon account/credit card / email (although it says one per household)
As soon as you get it, put the code in your amazon g.c. bank so it will keep it forever (apparently you have to "redeem it today, but just put it in the amazon gift card stuff on amazon, and it shouldn't go away)).
Shucks. I just bought a case from amazon, maybe a half-hour ago. I bought the gift card anyway. Thanks for the heads up!
Did you guys receive your voucher by email? Mine was processing forever on the local page and when I refreshed it is no where to be found. Will I be getting an email with the code?