Double XP from the DewXP promotion is no longer working for me. I received about 5 matches worth of Double XP on the night of Nov. 6, but after that I have not received any more. Before the game came out I had banked about 35 matches so I know I didn't burn through it all before it stopped registering.
Yesterday I added a couple of more codes, and then played last night afterwards, and still did not receive Double XP. Thanks for looking in to this.