Making Money on Social Media

What disappointed me about the speaker last month (John Kreamer?) who wrote 1,000 Ways to Sell your Book, was that he spent a lot of time on Social media but there were no dollar figures on anything. Just once I would like a publisher or author to stand up and give some specifics like, I did this on Facebook and made X dollars doing it. It seems that everybody wants to do social media but nobody gives any clue as to how they make money doing it and what kind of return they get. Does anybody else have information on this? Steve Kiesling