Only sort of. Let's say I'm doing general advertising but want to know the age and gender of people who click on my ads. So I place ads for "men age 18-20", "men age 21-24", "men age 25-35", ..., "women age 18-20", ... . I give each a different landing url. Then I as the advertiser learn more about my incoming users than I would without targeting. I can't pull all the demographic information the ad network knows because if the buckets are too small things like CTR estimation work poorly, but if I'm high volume I can get good resolution.
Only sort of. Let's say I'm doing general advertising but want to know the age and gender of people who click on my ads. So I place ads for "men age 18-20", "men age 21-24", "men age 25-35", ..., "women age 18-20", ... . I give each a different landing url. Then I as the advertiser learn more about my incoming users than I would without targeting. I can't pull all the demographic information the ad network knows because if the buckets are too small things like CTR estimation work poorly, but if I'm high volume I can get good resolution.