As an advertiser who has used Facebook, I’d argue that ‘when you advertise on Facebook you are pretty much shooting in the dark.’ Is far from the truth.
The reason FB has grown its revenues is because of advertising. The amount of granular data on every user on FB is incredible. They know your demographics, your location, your politics, your likes and dislikes in food, movies, books, hobbies, etc and even your relationships (father, son, mother, sibling, etc). And those are just a few of the data points you can target as an advertiser. I don’t see how any company could provide advertisers more targeted traffic.