Comment by ChuckMcM

The thing about infectious diseases (the model they are using) are that the virii just die and that's that. What is not clear is where 80% of Facebook's users would be in 2017. Google+ ? Somehow I don't think so. This would be much more compelling for me if there was some Facebook alternative that was growing rapidly in the 14 - 24 demographic but the Princeton guys don't mention one, and I've not come across it yet. Its hard for me to believe that 80% of Facebook's users will stop using it and go back to no equivalent.