Not sure if Bungie messed up or their still going out but i've noticed that quite a few of us still haven't received the shader and was wondering if anything had happened and that's why there's such a delay.
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There is no delay. The codes were being sent out throughout the week. It has not been a week since the codes started being sent. Just wait a little longer and if when the week limit arrives you can contact Bungie through the customer service on the Bungie store to enquire not through the forums.