My coupon arrived today. I did the online submission rather than through my phone and glad I did. If you read the rules, in order to submit the claim on your phone, you give them permission to pass your info around and send you a boat load of spam texts.
After buying 20 bags of charcoal, Kingsford graciously sent me a coupon for a single 7.7 lb bag. I've now got 3 months to find someplace that sells bags that small before the coupon expires. Additionally, the coupon has a maximum value of $6.90.
Color me unimpressed.