Confirmation bias, coincidences at scale, sure, certainly a part of it. But I had always thought big tech would just correlate interests of people it knows spe

Confirmation bias, coincidences at scale, sure, certainly a part of it. But I had always thought big tech would just correlate interests of people it knows spend time with each other. E.g. my father gets an e-bike, I get e-bike ads. It could of course be due to me scrolling over one e-bike ad less quickly once.