Earlier quoted context omitted.
>> Hayek is arguing that no centralised agent has perfect information. The author is arguing that Amazon is approaching the stage when it would have perfect information about the consumers it serves. >This statement in the article is a huge misstatement. At least blame the right person: me. The above statement is a paraphrase of what I thought the author's argument was. >First, Amazon only has information about the g…
> it is a marketplace-as-a-service To the extent this makes a difference, because of Amazon's efforts to monopolize various market segments by undercutting competition, it decreases the amount of information Amazon has about other market participants. A perfect monopolist, by setting monopoly prices, decreases the value of the price information it gets through transactions, because there are no other competitors offe…
>To the extent this makes a difference
It does, because you're arguing as if Amazon sells stuff. It doesn't (just) do that: it's a market-maker that provides a venue for other vendors to sell stuff.
So it's already an error to talk about Amazon as a monopolist, when Amazon isn't the only marketplace out there with a global reach. But you're also making a category error, because you wrote:
>A perfect monopolist, by setting monopoly prices, decreases the value of the price information it gets through transactions, because there are no other competitors offering the same goods at different prices to compare to, so the prices of the monopolist's transactions convey less information about the preferences of other market participants.
Amazon doesn't set prices per se, at least not for vendors in its marketplace that are not itself. So it doesn't do whatever you think it's doing when you were writing that paragraph. Certainly there are "other competitors offering the same goods at different prices to compare" with, because Amazon's marketplace include other vendors. But Amazon is running a marketplace, not (just) being a vendor. There's a difference in category there.