Great to make sure there's funds when there is a slow seller.
I buy a lot from amazon and sometimes it would take days to weeks for a seller to finally ship something and THAT is when the money typically came out of the account.  Being lower middle class meant that sometimes orders would fail.  I get these gift cards for myself or my wife to buy with instead of relying on a seller.  Amazon fills them quickly - usually within 5 minutes.
Rating: 5 stars