Worked 2/3 times
I'll be honest, I didn't expect much nor did I even know this feature existed until a few minutes ago.  I mainly wanted to use old pre-paid debit cards to pay for a "splurge" purchase.  I was not offered nor did I expect to receive any of the rebates/rewards that other reviewers are talking about.  At first I felt a bit mischievous, like.. is this ok?  Am I doing something weird that I'm not supposed to be doing, combining all these prepaid cards into one balance?  And it was fine, for the first two cards, both prepaid Visa debit cards, and I was pretty happy when my email dinged and my balance was updated as expected.  For the "name on card" data input I used "GIFT CARD RECIPIENT" for both and that worked out fine.  One reviewer stated that the cards had to be registered prior to being used for this purpose.  I registered one of them (it was a Wal-Mart branded gift card from Visa) and the other didn't have any obvious way of registering it so I didn't do anything, and both worked the same and took roughly the same amount of time to update in my account balance.  Pretty cool way to use up prepaid debit cards with a miscellaneous balance, but....<br /><br />The third try was not a charm, more like three strikes and I was out of luck.  I tried using a prepaid AMEX, which happened to have the most value of the three cards (all were under $100), and it was declined.  I read some reviews that said Amazon does an authorization check by dinging the card for $1 (Amazon's policy on prepaid cards also mentions this, it's not really a charge I guess?  I'm not a finance guy so I really don't know), and tried again using $1 less than the known value of the card.  Still declined.  Not sure what the reason is or could be.  The email explaining the decline listed some standard reasons for why it might have declined.  Interestingly, one of the reasons listed in that email was that the name on the card didn't match exactly what the bank had on file... being a gift card, there was no name on the card, though it did say "a gift for you" which I listed in the "name on card" data field for the first try.  Then I tried a second time and entered "GIFT CARD RECIPIENT" in the name field, which worked for the previous two cards, but no luck this time around.  Not sure what's up with that, not a big deal I guess, as I said I expected nothing going into this.  Obviously other reviewers have pointed out some crazy stuff that happened to them, I'd say be meticulous and pay attention to all the little details so you don't accidentally reload from your checking account when you don't mean to, but other than that my experience was positive.... 2/3 of the time.  I'll make sure I update this review if I can make the third card work.
Rating: 4 stars