There's better targeting like "This is a guy, so tampon ads are not likely to convert" and there's better targeting like "This guy watches a lot of porn, uses F

There's better targeting like "This is a guy, so tampon ads are not likely to convert" and there's better targeting like "This guy watches a lot of porn, uses Facebook religiously, uses GitHub, lives in a high-rent area of San Francisco, owns two dogs, is probably gay, and is looking to buy a vacation property in Nevis." The first is broad strokes. The second is extremely intrusive.