By "back in the day" I mean 10+ years ago, and you'd have to browse for a few days.
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):
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...