1. Amazon isn't so special that even they can control the distribution curve to only have rockstars,
2. This is too big for a single team in the first place, let alone 10 rockstars,
3. You don't want any rockstars, let alone only rockstars on your teams,
4. Managing low performers is a magnitude more work than solid performers; no manager would do this to themselves on purpose. It would be easier to cut their 2 least rockin' stars.