It's sad when social networks and messaging platforms die. Every major one I've gotten invested in has gone belly up: AIM, Xanga, Yahoo Messanger, MSN, Myspace, and now Facebook is hemmoraging users. And Whatsapp isn't too far behind with a lot of its functionality duplicated by RCS or iMessage. The point is, don't get too invested in a messaging platform or social network because they don't last forever.