>Advertisers have succeeded for years and years using Billboard, Radio, TV, Newspaper, and magazines with very limited viewer demographics. This is true, but p

>Advertisers have succeeded for years and years using Billboard, Radio, TV, Newspaper, and magazines with very limited viewer demographics. This is true, but product categories were also a lot more generic and "one-size-fits-all" as a result. What targeted advertizing allows is for stuff that isn't lowest-common-denominator to find its audience. There are trade-offs, of course, and I think Facebook and modern Ad Tech's business models are based more on megalomania and hyper optimizing around bad metrics (an organizational grey-goo scenario) than actually helping services find their audience.