Question about pre-ordering GW : EotN

If I preorder EotN off of any website (IE amazon, eb games) will the special preorder items and sneakpeek weekend apply? I was just kinda wonderin hoiw that all worked so i dont buy it and get screwed over in the end...

to apply it, the company you bought (or are buying from) needs to send you the prerelease box and then you add the prerelease code to your account, just like anything else

without the prerelease code, you don't get the weapons, or sneakpeak weekend