To be fair, that was in era when pirating was such a normal thing. Everybody at least knew about it. Cheap pirated DVD's were super common (I received them as gifts even) and everyone knew someone selling them. With people accustomed to paying for Netflix, music streaming, Office 365, etc. maybe a subscription version of WhatsApp would be more palatable. The problem is nobody will pay as long as the tech behemoths are offering the same thing for free.