PSA - many of you may already know/realize this, but I just discovered it today. I've been sitting on a promotional gift card of $200 for some time. Plan was to get an Amazon order up over $200 and use it, and then use my CC for the balance over $200. I thought Amazon would be smart enough to accommodate. And they are, sorta. I made an order of about 10 things for my car (upkeep type stuff and specific tools) that totaled ~$230. Put in the promotional gift card number for the purchase, and it seemed like it all went though.
Not so fast. My 10 items were split up into 4 separate orders from the actual sellers. My gift card was hit each time for each of the four orders, and thus didn't have enough for the 4th order. So now I have some odd amount remaining on the card that I'll have to figure out what to do with.
Anyway, after talking with them on the phone - I was told what I should have done and it makes total sense. I should have purchased a $200 amazon gift card with my $200 promotional card. First off, it will never expire. Secondly, the system knows immediately how much is left on an Amazon gift card, so it would have only charged me the balance after the full $200 was tapped out.
Thought I'd share here to maybe save someone else the headache.