Earlier quoted context omitted.
> I don't know what the formal definitions of any of these things are, but I assume (hope?) that it's important not to equate being successful with being a monopoly by definition. If Ford came out with an amazing new car tomorrow, and suddenly 95% of new cars purchased were Fords, we probably shouldn't initiate trust-busting action against Ford on that basis alone. We want car companies to try to capture market share…
Amazon's search is so bad that it's almost certainly intentional in order to get customers to look at more products. This is a great example of them using their monopoly power to increase their revenue to the detriment of consumers. For an idea of what it could be, try the search on electronic component distributor sites like Digikey[1] and Newark[2]. They are both improving their search in order to attract more cust…
You don't window-shop Digi-key. You're pretty much buying on spec sheets alone. I want to see all 330 ohm 1/4 watt through-hole resistors, now sort by price and availability in the quantity I need, then maybe discard products that don't meet some other criteria that I can't directly filter for. There's very little chance of making a sale through a slicker marketing campaign.
Conversely, people buying a single monitor might be browsing, potentially swayed by the right language and graphics on the landing pages. I'm pretty sure those bloody finches sold more ViewSonic monitors than any other aspect of their product line. For a window-shopping customer, getting the customer to see as many of them as possible improves their chances of a sale.
On the other hand, I will concur that Amazon's search is a disaster for computer products. I suspect it's also terrible in other verticals that have clear, well-defined "faceted search" concepts, but we probably have the most experience with that one here. I suspect it may be a casualty of their broadness of categories-- why spend the labour to provide really killer search if it hasn't proven to be an impediment to sales yet?