'Amazon knows more about you than your best friend or your doctor'

For some definition of "knows", yes.

They don't really "know" a lot about you just because they have saved a lot of searches, they still need to understand what those searches mean.

My best friend definitely knows fewer of my searches and buys, and his product recommendations are usually spot on, while the only useful Amazon recommendations I've ever seen were "buy again" for things like tea or soap.

They don't know what they know. My 20 year old account regularly gets suggestions for women's clothing, which I have never purchased and don't wear, as I'm a man.

Maybe we should search for products we're not interested in at all, just to poison usefulness of such intrusions.

I'm off to search for knitting supplies...

Amazon doesn't know anything. Sometimes I go on Amazon literally LOOKING for something to buy. That's any seller's dream, just show me anything I might like. You have hundreds of my purchases to reference, thousands of hours of browsing experiences. It basically never has anything remotely relevant, or if it is, it's things I've bought.

I'm tired of comments like this, we all know they're correct - that is they're only correct if you use Amazon's services.

And I don't for that very reason.