“In 2014, Facebook bought WhatsApp for $16 billion, making its co-founders — Jan Koum and Brian Acton — very wealthy men,” reports The Verge. “Koum continues to lead the company, but Acton quit earlier this year to start his own foundation.” Today, Acton told his followers on Twitter to delete Facebook. From the report: “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. Nor did Facebook and WhatsApp. It was unclear whether Acton’s feelings about Facebook extend to his own app. But last month, Acton invested $50 million into Signal, an independent alternative to WhatsApp. The tweet came after a bruising five-day period for Facebook that has seen regulators swarm and its stock price plunge following concerns over data privacy in the wake of revelations about Cambridge Analytica’s misuse of user data. Acton isn’t the only one taking to Twitter to announce their breakup with Facebook. The #DeleteFacebook movement is gaining steam following the New York Times’ report about how the data of 50 million users had been unknowingly leaked and purchased to aid President Trump’s successful 2016 bid for the presidency. For many users, the news “highlighted the danger of Facebook housing the personal information of billions of users,” reports SFGate. “And even before the Cambridge Analytica news, Facebook has been grappling with its waning popularity in the U.S. The company lost 1 million domestic users last quarter — its first quarterly drop in daily users.”