Never base your long term business plan on the whims of 13 year old girls with an attention span of 2 hours. LOL, OMG!!!
I’m 64 years old and I’ve been on FB for 3 years. I have friends from many age groups, the majority of them over 30, and many around my age. They, in turn, also have friends in their age group. Yes, there are 13 year old girls on FB, but FB is a diverse group of people - rich, poor, black, white, married, single, young, old, and many military members and their families. I don’t know about all the financial hullabaloo because being on FB doesn’t cost me a dime. I can’t see FB going away because there are millions of members who aren’t going to just go away. It may become another social site with another name, like what happened to MySpace, but it will be around in some form.