Just to add some more context to the question of "who uses whatsapp", in South Africa basically everyone with a smartphone uses it. It's a verb in the same sense as "google". A while after BlackBerry started the adoption of smartphones with this baby it started to gain traction because it was cross-platform, unlike BBM at the time. I use whatsapp to talk to friends, family, my debating students who live in a township, and my boss a few times. It's pretty ubiquitous. Strangely, I have never paid for whatsapp. They keep extending the free period. I always assumed it's because they don't expect people in developing countries to be able to pay at all (not many people use PayPal/Google Wallet). Everyone I spoke to today seemed at least skeptical of the merger.