[laluser]

> Still, as an Amazon investor, I do wonder why Amazon has to do everything themselves. It makes me nervous that they are essentially building or their own ride sharing network rather than leveraging existing networks.

When Prime Now started, there were no other companies that were doing what Amazon wanted to do. Let alone, keep up with the expansion that Prime Now has realized over the past few years. In addition to all that, Amazon loves to optimize every little detail. Flex is the logistics infrastructure that didn't exist to support Prime Now and other delivery programs such as Fresh, .com packages, etc.