> I think ads would actually do better if they're just targeted to the demographic that fits the page I'm currently looking at without being personalized. Ther

> I think ads would actually do better if they're just targeted to the demographic that fits the page I'm currently looking at without being personalized. There's a gap: Getting search/retargeting interest information is almost instant, but finding out you've purchased is hard and takes time. However it's effective enough: Retargeting boosts most verticals by as much as 3-5x, and where that one click pays $1 the ads cost about $3 per thousand to display them.