Relevant background on Brian Acton's funding of Signal, after leaving Facebook: "WhatsApp Cofounder Brian Acton Gives The Inside Story On #DeleteFacebook And W

Relevant background on Brian Acton's funding of Signal, after leaving Facebook: "WhatsApp Cofounder Brian Acton Gives The Inside Story On #DeleteFacebook And Why He Left $850 Million Behind" (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/ https://www.forbes.com/sites/parmyolson/2018/09/26/exclusive...)