Been there, done that. It's already hard to scale those two apps beyond your immediate circles and people won't just stop using WhatsApp or Viber or whatnot. Bu

Been there, done that. It's already hard to scale those two apps beyond your immediate circles and people won't just stop using WhatsApp or Viber or whatnot. But then try to convince your friends that they have to convince their friends. Friendships are not a pyramid scheme.