Why the Largest Social Network in 2015 Won't be Facebook, and Will Be From Asia

I did not see any social network you listed other than KakaoTalk and the elk which are mobile messenger. Though their SNS quotient can be disputed, they are certainly nothing like Facebook which is a part of the post article or even Twitter.

You mention path which is designed not to become too big and if they stick to that it will never surpass Facebook.