Point - Brian Acton (Co-Founder, Whatsapp): "They (Facebook) are good business people. They just represent a set of business practices, principles and ethics, and policies that I don’t necessarily agree with" https://www.forbes.com/sites/parmyolson/2018/09/26/exclusive-whatsapp-cofounder-brian-acton-gives-the-inside-story-on-deletefacebook-and-why-he-left-850-million-behind/

Counterpoint - David Marcus (VP Messaging, Facebook): The other side of the story - "attacking the people that made you a billionaire is a whole new standard of low-class" https://www.facebook.com/notes/david-marcus/the-other-side-of-the-story/10157815319244148/

The main lesson - "Don't sell your company if you don't agree with your buyers' policies." Whatsapp sold their company for a huge profit to an ad platform. What did they expect?