I dunno really. Two day shipping on most everything used to be a pipe dream... also from what I understand part of amazons problem is razor thin margins they make up for with poor labor practices and sheer quantity. None of that sounds like a "big piece of the pie" to me.
Honestly this is silly, as software is far easier to audit than hardware.
Bezos is the richest man on earth. Razor thin margins?
The money and the power comes from forcing the market to move in its direction, it took the juice out of retail business at large and funnels it into Bezos' bank account. Of course there is also the huge AWS division. Razor thin margins there? I doubt it...
The erosion of worker's rights matters and so does the erosion of everything that is local. Much like how algorithms are starting to control our lives and choices, this too is an inevitable road to nothingness and the absolute bottom of ethical or sane behaviour. Internet + commerce + data. Its a cocktail that will always taste the same and gets utterly boring very fast and it gains us nothing except 'fast, cheap, easy'. The same 15 minute dopamine shots the same parents whine about with their Fortnite playing-kid
Click buy, must have now. Almost every recent web development has been aimed at making transactions fast and easy, removing all consideration and pause from it. After all, if you stop to think for a moment you might realize you've been funnelled into a 'buy more save more' idiocy much like how Nvidia sells its cards now
Web design has been focused more and more on commerce and many times we don't even realize it. Even the way cookie walls work, is rife with filthy psychological trickery.
And a lot of tech companies got way too big over it and the ultra slow common sense development of governments in that regard. They were sleeping and they still are, and power gets siphoned away from them and into the hands of corporate. The amount of control that is currently with Amazon over pricing and analytics of the market, is unhealthy. The same goes for search wrt Google, or journalism wrt Facebook. And since we're invested, the knee jerk response is to let them control even more.
It happens everywhere, even China can't ignore it, as it now swings the banhammer at a lot of the biggest fish in the China tech pond, like Mr. Ma's Aliexpress.