alt Hacker News> "The most stupid thing is the fact that after I have searched for something to buy, I am bombarded for a long time with related ads, but that is exactly when with certainty I am no longer interested in that kind of ads"
Please see this comment exchange from 3 years ago: https://news.ycombinator.com/item?id=37218627
> "the correlation between $just_bought_thing and $will_buy_another is very, very high ... Showing someone ads for products in a category they recently purchased from is one of the most effective things a store can do ... the data is exceedingly clear."
I'm sure it's one of the most useful signals for the advertisers, but it is also one of the most irritating behaviours for the consumers, because even if this is a very high correlation in advertising terms, it's still the majority of the time not actually accurate for the consumer (like with all ads: I buy some orders of magnitudes fewer products than I see ads, even with adblocking, so even if I only bought things I had seen ads for, the vast majority are not helpful to me).