True, although there is a couple of unofficial APIs that have managed to stay up. Now, the big question, how will FB make its money back? It has to open Whatsap

True, although there is a couple of unofficial APIs that have managed to stay up. Now, the big question, how will FB make its money back? It has to open Whatsapp to advertizers and/or integrate to its platform of services. Or did it buy it to take it down while pushing FB chat as a standalone web/native app?