Not sure where I just saw this, but someone online (here, or FB, or elsewhere) was complaining about ad content on Kindle. As far as profits go, Amazon posted a profit, or perhaps it was just positive earnings, sometime in 2015 (recently), first time ever, or at least first time in some years. They are taking on Walmart, or rather, they have been for some time now, and Walmart has been trying to respond.
I have ordered from Walmart when I could have ordered from Amazon. The main factor is I have a Walmart very close by where I can EASILY return an item. But most of the time I am ordering from Amazon which is outdoing ebay these days because you have product reviews at Amazon. But ebay is great for used items. Spent $130 on one yesterday.
Almost spent #200 on a reconditioned chromebook from the Acer outlet at ebay