It feels like WhatsApp is everywhere. Who isn’t familiar with the gentle ding as a message arrives - the relentless group chats, or the customer service bots? According to recent statistics, the service is used regularly by nearly 3 billion people around the world. Its core service - end-to-end encrypted messaging - is essential in today’s society.But private messaging services like WhatsApp are costly to run, and not something people are accustomed to paying for. Securing an income stream for…