The article missed one huge factor: date farming by AWS/Amazon. If one has data on pricing and sales across retail and online channels on a national scale, how risky would a purchase of a retailer really be? Not much, as you can pivot towards high sales, high profit products without doubting your strategy Target, Walmart & other retailers de-risked Amazon's purchase of wholefoods
Do we know Amazon's policy on "peeking" into people's AWS data? I feel like they would have something against that in their ToS/Privacy Policy.
Microsoft issued a statement in justification saying that it didn't need a warrant since they consider that the data stored on their services is their, and no warrant is required to search oneself.