GIANT-SIZE X-POSITION: Lemire Launches "Extraordinary X-Men" - Part 1
I know I received a review copy from Ivory Madison that came through Amazon, so my best bet is that Ms. Madison bought a few hundred copies all at once to send to people for review copies. That should be enough to make any book temporarily #1 on Amazon’s list.
Comics Should Be Good accepts review copies. Anything sent to us will (for better or for worse) end up reviewed on the blog. See where to send the review copies.