Man what a dumb ass promotion. I don't know how it works but there really is no rhyme or reason to what gets accepted or rejected. Because contacting support is useless since they don't actually support you and just send you a canned response, I snapped a new picture today and sent it in and that got accepted already.
The first time it took days and now this time it took just hours? Same receipt. So who knows what it is. The difference this time is instead of taking a picture in portrait mode, I did landscape, and I had the candy in the picture with barcodes showing too. Doing those things don't necessarily guarantee you'll get it as others in this thread have pointed out they got rejected for the same info. I have no idea how the same receipt gets rejected once, then accepted the second time.
Man, we should flood someone's Twitter with how awful this is being run. Maybe the negative publicity will make them think twice next time.