https://www.theverge.com/2018/3/20/17145200/brian-acton-delete-facebook-whatsapp

In 2014, Facebook bought WhatsApp for $16 billion, making its co-founders — Jan Koum and Brian Acton — very wealthy men. Koum continues to lead the company, but Acton quit earlier this year to start his own foundation. And he isn’t done merely with WhatsApp — in a post on Twitter today, Acton told his followers to delete Facebook.

“It is time,” Acton wrote, adding the hashtag #deletefacebook. Acton, who is worth $6.5 billion, did not immediately respond to a request for comment. WhatsApp declined to comment.