I walk into the grocery store to get some fuji apples. I keep asking for fuji apple" but I am affixed with horse blinders and walked to the cell phone isle by a helpful clerk, and a bunch of iPhones are presented.
I ask the clerk for "fruit fuji apple", and I am escorted to a different isle with all kinds of accessories for iPhone.
I walk over to the fruits & vegetables department, stand in the isle with all kinds of apples, and ask for the "fuji apples" again. The clerk promptly walks me back to the iPhone accessory isles, and leaves me there.
I go out of the store, ask a passer-by where the fuji apples are in the store, she tells me exactly. I walk into the store, go to the exact location, and see the fuji apples.
I put it in my basket, walk to the check out. At the checkout the clerk asks me if I want to include a 1 year protection plan, or purchase a charger for my apples. I decline.
I purchase it, go home and wait for the apples to show up at my door.
Two days later the fruit show up. They are williams pears.
I am not sure why I am being downvoted for something that I and others have observed; must be the Amazon fanboys having a hard time acknowledging they work for a shitty company. Other companies have done this for years too, like airlines. It's also not like you need to search very hard to see all the lawsuits Amazon is involved in, but here is one link describing price changes (which occur due to many things, of course, not just user profiling):
https://talkradionews.com/does-amazon-increase-price-after-v...
Don't forget that Amazon is also the same company that removed 1984 from people's devices. Of all books...
The principle difference being that shoppers aren't actually asked for their names.
(Names are determinable through interpolation of those signatures, or through payment information by credit or debit card.)