Would have been a good idea
I was excited to send a birthday card with an amazon card for purchase of whatever, and the fact that I got next day delivery for free did it for me.  However, Amazon had some mess up on their end and instead of taking one day to deliver it was 4 days.  Also, the personal message I wrote to have added somehow never got added.  So, he got a blank birthday card with a gift card in it, four days later.
Rating: 2 stars