@mollyoppy @Bibittybobittyboop @Ella6 Erm - no. I am not naive, and yes of course companies collect data for a purpose.
I'm saying that you're quoting this oft-repeated hoary old story about "how powerful data-led marketing is" to make out that data-led marketing is an invasion of privacy. When actually, it's a funny story that doesn't really tell us anything about how effective that campaign was.
If I sent a mailer to every person in the UK advertising nappies, then at least one of the recipients would go "ha, this is relevant to me". If you only look at that one person, it looks like an amazing, effective, powerful piece of data-led marketing and I am the best marketer in the world. But that's not a true picture of what happened.
Do companies use shopping data to drive more relevant, more effective marketing? Yes. Does that mean they always get it right? No. If you're going to tell an amusing story then fine, but be cautious about the conclusions you draw from it! Sorry if you don't like the full uneditted version of the story, but some of the women to whom Target sent the same mailing were not actually pregnant, and the teller of the story chose which bits to tell, to suit their agenda. So no, I am not the naive one...