Considering how many non-Americans use fake addresses to buy from Amazon, yeah their customers aren't really the sort who are huge about following rules and being honest.
Dude, what's your problem with non-Americans? You're the only person I've heard complaining about that (and quite often). And Amazon IS GETTING OUR MONEY, yeah, sure, we might be circling around the system, but we're not being dishonest.
I believe Amazon knows that, that's why they are allowing that loophole (i.e. purchasing with a gift card without validating CC). Amazon clearly believes in a really open world, and I'm pretty sure only enforce regional restrictions due to pressure from publishers (i.e. they don't enforce anything of the kind on physical purchases, you can use any CC from any country)
So, thank you Amazon, for being realistic and knowing what the internet is really for: Breaking geographic barriers, not making them worst!
Back on topic, that preorder promotion is awesomely amazong (intended)