if a dataset is really valuable, it wont be available for public consumption/copying, and, like nike, won't be selling itself on amazon
That's how data companies make money, by doing that work for you.
Data vendors sell valuable data all the time to essentially anyone who is willing to pay their asking price. I don't see how this is any different? Just because aws is trying to run a marketplace doesn't suddenly make the data "public" in an open/free sense, there's still a price tag attached to it.
> and, like nike, won't be selling itself on amazon
Not every data vendor (or retailer since you keep bringing up Nike) has the necessary brand recognition, marketing budget, or technical proficiency to only sell direct to customers: that's why centralized marketplaces and alternate distribution channels exist.
if it s truly valuabe it isn't sold to 'essentially anyone'. like high value financial info or security.
I feel like you haven't had the opportunity to work with data that has value.
It will be a very busy, but lucrative time for corporate law firms as they battle things out.