Two interesting articles about the economics of FB and how it does not add up.
http://www.thedailybell.com/3756/80-of-Financial-Advisors-Not-Recommending-Facebook
http://www.thedailybell.com/3869/Face-of-US-100-Billion-Facebook-Specialty-Is-Pilfering-Client-Data-While-Instagram-Is-a-Craft-Package