Recently one of my friends on Facebook liked a post: it was a picture of a girl with Down Syndrome called Mallory,whose sibling wanted lots and lots of facebook likes to show her how beautiful she was; and my friend had commented on what a lovely girl she was. Needless to say my bullcrap detector was at high alert, and did a quick google about it. The link below is the best summary of the whole sickening thing of "Like Whoring".
http://www.surfnetkids.com/tech/2089/what-is-facebook-like-scam/
So, Facebook likes, the new Snake Oil of the twenty-first century I reckon. And they can be brought and sold.