WhatsApp’s other co-founder, Jan Koum, also reportedly [1] walked away from hundreds of millions by leaving Facebook due to disagreements.

Turns out he was still employed [2] despite saying it was time to “move on”, in order to get his remaining money...lol

1 - https://fortune.com/2018/05/01/jan-koum-whatsapp-facebook/

2 - https://www.cnbc.com/2018/08/15/whatsapps-jan-koum-left-face...