This came in an 5x7 envelope. Plain front and big CC logo on back. Almost threw it away with the rest of the junk mail. There is a short form letter about how the understand and appreciate, and care ... blah blah blah. Since the original post I have spent it, so I can't scan an image. The good news is that it is just a simple $15 GC with no strings.
This might be more of a 'win-back' promotion. I am not a big CC customer at all. According to Quicken, I have made 3 purchases in the last year totalling $246.01 I recall buying the Apex DVD and 3 packs of TDK cdrs (made $30 on a Target PM). The customer service rep said he'd seen one other today, so hopefully your's are in the mail.
FYI - I live near Orlando, FL