Ahh, this explains why I, a web developer in the middle of the Canadian Prairies keeps getting hit up by Amazon's recruiters. Quite possibly they've poisoned their local talent pools so much they have to pull in naive people from out of market.
Glad I saw this article - now I don't need to fret about whether I should respond to the email. Just the very fact this article was written signals enormous alarm bells for anyone considering moving to work at Amazon.