KEY POINTS
  • A number of companies tell CNBC they stopped advertising with Facebook and Instagram after the scandals involving user data and privacy.
  • Mozilla says it left the social network and won't return without "significant and systemic changes in the way Facebook treats its customers."
  • The exodus hasn't shown up in Facebook's earnings, which continue to grow rapidly.
Mark Zuckerberg, chief executive officer and founder of Facebook

On Dec. 19, David Heinemeier Hansson quit Facebook and Instagram. It was a decision he made alongside his business partners at software company Basecamp.

"We've decided to become a Facebook-Free Business at @basecamp starting today," Hansson, a prominent programmer with over 300,000 Twitter followers, wrote in a tweet. "No Facebook, Instagram, no WhatsApp. No ads. No profiles. No pages. No usage. No more."