I mean... a little disingenuous. AMZN was a $10-20B publicly traded company at that time. When is it a startup vs a product offering of an established company?

I think it's a bit unfair to characterize every company that is "starting" as a "startup", particularly when the "startup" in question is/was backed by one of the largest companies on the planet. I don't think people think of such companies' endeavors as startups, even when they are starting.

You mean when they separated internal infrastructure of the largest ecommerce in the world to the point when it was possible to sell it in commodified pieces to other businesses?