Facebook Statistics: 3 Million Teens Leave Facebook In 3 Years

Well that is one reason why investors are so excited about Snapchat - just follow the teens and they will take you to the next big thing. This strategy mostly works. We spotted this stat today, that in the last three years, some 3 million teens have left Facebook (Source)

Mark Zuckerberg tried to solve this problem with a few billions but that strategy failed. How do you get the teens back?