Here is a quote explaining the confusion. I take no credit, it was actually edited into the wpcentral article after the fact.
I am interested to see how many of these deals actually get fulfilled. I sent mine out when the date still read the 16th, and my purchase date falls into that slot. That said, it sounds like the limitation is going to be that you must have purchased the phone at the "pop up store". I am guessing they are not offering the charging plate anymore. I could be wrong though! We will see!
Part of me hopes that they only fulfill those who purchased at said store. As nice as it would be to get something for free, I feel like this would make early adopters (who am I kidding, they shouldn't be called early adopters, they should just be called launch week adopters lol)feel a little better. I hope Nokia and AT&T learn some valuable lessons here though. People want something for nothing when they hear someone else got a freebie. Pick a promotion that YOU CAN STICK TO and stick to it. Why on earth they are changing promotions based on which US state you live in, when you bought the phone, etc. is beyond me. This is another place Apple shines. "Buy our phone. It's $199, $299, or $399 based on model. It will be that price until the next one comes out about a year later". Nobody feels gyped because they bought their phone two weeks later than another guy. Win, win.