Er, are you sure this is kosher? I don't want to get banned from XBL or worse because I downloaded that stuff.
While they're technically store exclusives, there's no listed pre-requisites on the page, and they're being offered for free directly from Microsoft right on the page.
It's kinda like when Microsoft gave anyone that asked the codes for the Fable II collector's edition stuff. You didn't even need to prove that you had purchased it, and there were no negative repercussions. You won't get banned from Xbox Live for this.