I for one will continue to refuse to use anything that Facebook gets their grimy, privacy-invading hands on. Sure, this might be another example of blockchain technology going more mainstream, but you can absolutely guarantee that if you use this, your addresses and transactions will be added to Facebook's ever growing profile of information on you, and then sold to highest bidder with absolutely no regard for your privacy, anonymity or security.
Agreed, but the majority won't. Even in the wake of all of Facebook's scandals they still see near record levels of traffic. I for one deleted facebook following all such events as I don't like the idea of someone manipulating my decisions in some way. I do still use whatsapp but it's almost a necessity and I feel that there's more safety in that.