What investors see in Amazon, though, federal antitrust regulators have so far failed to grasp. The Whole Foods deal, which requires federal approval, will be a fresh test. If regulators look at the deal in conventional terms, they may decide that it should go ahead on the grounds that brick-and-mortar grocery is a separate market from online shopping, and that the transaction would give Amazon only a modest share of the supermarket industry.
I think this is a little hyperbolic. It starts with talking about Amazon's infrastructure offerings, like AWS and then delves into the complaints about their monopoly over book sales. As an outsider I don't see Amazon abusing their position with AWS. It's also possible that the Motherload article was so sputtering that I can't follow their point.