> And if the answer is: "but network effects", why not Facebook messenger? it has the same reach if not greater. The last message in my Facebook messenger is a

> And if the answer is: "but network effects", why not Facebook messenger? it has the same reach if not greater. The last message in my Facebook messenger is almost a year old when a single person wished me a happy birthday. My WhatsApp is 'a bit' more active than that with 9 different groups / people in the past 7 days. I know only a single person that doesn't use WhatsApp. He uses Signal over privacy concerns. In my experience Facebook messenger usage is a rounding error.