I always thought that Facebook were too big to fail, like in no one would close their account because of what they've invested there (friends, pics, etc...); yet, people are leaving it at an unprecedented rate. I remember Facebook desertion not being much more than a statistic even a year ago, now it's pretty common to encounter people that don't have an account there anymore. I think that the bandwagon effect that is behind the growth of online communities is a double-edged sword; once the trend shifts to users leaving, the more they leave the more users are likely to leave later and everyone snowballs out until there is no one left. Fortunately for Facebook, many of those peers left because of WhatsApp/Instagram, so business' still in the family... for now, albeit much less profitable. Sooner than later, FB will be gone and its place will have to be filled up by something else. Snapchat has a seat reserved in the post-FB era and apparently that is worth at least $20B.
Anyway, derailing the discussion a little, I'd like to hear what you'd think if 'Core Facebook' went out of business right now (but not WhatsApp/Instagram). Would you consider it a success or a flop? Was it a profitable endeavour or not?