>... do you have a better way of reaching those targeted viewers?

I'd be curious to see how blogs do at targeting certain demographics. Presumably if you had a blog aimed at high-earning college educated people you could get a pretty high ratio of (target demographic/all viewers).

But I assume advertisers generally trust metrics more than intuition so you need something like Facebook or Google's ad network to identify someone as belonging to a certain demographic before the advertiser will believe it.