They are using as much free / open source as possible and giving what back?
I'm sure there have been several articles on the Reg and Ars etc discussing their packaging up of code and selling it as a service.
Maybe / hopefully some of the new licenses that Elastic etc are using will stem the flow but it doesn't look good for the startups trying to compete.
I have made a total of 2 code pull requests (minor translation issues for a language that has less that 1M speakers), one was accepted the other was accepted after an alteration I'm crap at coding but thought I should try to help. If I though this was going to help amazon I probably wouldn't have bothered.
Good one sticking it to Oracle but are Amazon any better?