Yes this comes up a lot. If something like 2% of people ever buy a GPU, but 5% of GPU buyers will buy another one soon, then you spend a lot less overall and al

Yes this comes up a lot. If something like 2% of people ever buy a GPU, but 5% of GPU buyers will buy another one soon, then you spend a lot less overall and also get a better conversion rate advertising only to GPU buyers even if most of them think you're silly for showing them the ad. It also preys on FOMO (show a better deal, they might cancel and re-order from you), brings you top of mind if they need a refund/replacement in short order, and does work for general brand awareness for next time, or conversations with a friend (since the ad knows you are now a GPU buying type of person). "Yeah I got XYZ GPU but I saw ABC GPU is cheaper and probably what you need." I probably missed a few things, but briefly it wouldn't be done if there wasn't a reason with the number of metrics they have these days.