No, the only reason I wouldn't is because of the rules Gamestop has. If I did get it I would buy the preorder the day I go to pick up Destiny, then cancel it soon after (Not a big fan of the series). But since the guidelines don't allow you to cancel after you use the code, I'll be missing out on it. But It will not matter anyways since you are able to get the shader through normal gameplay anyways, it'll just take a while longer.