[sleepybrett]

It will certainly be a regional phenomenon. Facebook will become blocked and/or uncool in some country and it will spread. Also generational, the younger you are the more tolerance for constantly trying new things will be. I don't see my mid sixties mother ever abandoning her facebook quilting groups or her chats with her cousins, but her kids and her grandkids will eventually move on to something else. Just like AOL it will shamble on shedding engagement (user numbers can be juked and what constitutes an 'active user' in their shareholder reports will constantly be relaxed to prop up their egos) until one day it's a footnote.