It’s entirely possible that they make most of their money off of the top few percent of online spenders, who probably don’t need to be targeted that well to mak

It’s entirely possible that they make most of their money off of the top few percent of online spenders, who probably don’t need to be targeted that well to make most of the money that’s made online, hence not justifying an especially-honed targeting system. Plus, we’re in the beginning of the era where the data has far more lucrative and powerful uses than direct ad-matching, so again it may not be to their profit to invest heavily in that area. I don’t know Google’s economics obviously, but that’s my guess.