But perhaps they are more happy with sales of some brands than others? That’s certainly true (and has been reported on) for other types of products, where their search results will serve up items that generate more profit for Amazon higher on the list. As I’ve stated elsewhere, a local brick-and-mortar shop owner previously told me that Canon’s margins for him were lower than other manufacturers, and it cut into his profits selling Canon compared to other brands (and Canon’s assurances that volume would make up for it wasn’t bearing out for him). I have no idea if that’s what’s going on with Amazon/DPR, but it is certainly a possibility...and if true, could be a rationale for bias in DPR’s reviews.
That sounds strange to me, as Canon used to have the best profit margins in the industry - that, there, is probably 50% responsible for their leading position in sales. The other 40% is their synergetic sales and distribution network - it really helps to have something as far-reaching as a printer business to get into big retail, especially in this age of cameras not being stocked anymore. Olympus, Pentax and Panasonic have all but disappeared from big box stores. Even Nikon has been dropped by retailers worldwide, which put the hurt in their sales numbers after 2015.
The remaining 10% is due to lens lineup or other technical criteria. It's not that important for the mass market, but it's become more and more critical as entry-level buyers dry up, and I haven't seen Canon respond quickly enough to this reality.
Amazon, with their huge volume and low overhead, can easily afford to sell the brand that people like the most, regardless of a specific product margin. Hell, I'm sure that if Pentax released the hottest camera of 2019 tomorrow, Amazon would gladly ramp up their K-mount offerings in a heartbeat, while DPR would still bash the brand like they always do
