Yesterday I went ahead and cashed out all my Mountain Dew XP codes and attached them to my gamertag, even though I don't have Halo 4 yet. Attempting to read the rules, I was confused. At first I thought I read you must have played Halo 4 before attaching them to your gamertag. Then I started thinking, why?

Does anybody know if the double XP will be sitting there on my account until I start up the game? Or did I just waste them? Just curious. Thx.

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Please CML: Thanks!