> With a bit of effort anyone can find products on Amazon that sell well (there's services that will do this) and then try to compete with those products. Amazon undoubtedly has more insights than those services provide, but that's

The fact that they can make sure it makes is prominent in any search result in the category, even for a competing product, is what makes it, combined with the fact that it's the one thing on Amazon you can be 100% sure isn't counterfeit, size no one else can sell it so there is no risk of commingling. It's nice that Amazon has found a way to trade on the unreliability of their own marketplace, and to leverage dominant market power in online into marketshare in any particular product market they choose.

Great for Amazon, that is; not so sure it's good for anyone else.