I'd be really interested to see how well this would scale. There's two problems, as I see it: 1) Larger company with more employees means more applicants, and

I'd be really interested to see how well this would scale. There's two problems, as I see it: 1) Larger company with more employees means more applicants, and likely a lower overall quality of applicant. Responsibly maintaining this system would require more HR to conduct more in-depth interviews, etc. I can see them reaching a point where this is no longer profitable for them. 2) Corporate environment changes as companies grow. An expansion of the bureaucracy, though necessary to manage a larger workforce, legal team, client relations, etc, tends to kill the entrepreneurial atmosphere that attracts quality applicants in the first place. The kinds of people who want to join a startup and are willing to turn down a chunk of cash just for the opportunity to work there are likely not the kind of people who are itching to join a large Amazon subsidiary. I could be grossly mistaken on this last point, and would be quite interested to hear how things have worked out for Zappos in this regard.