Mark Zuckerberg was grilled by the FTC about Facebook's purchase of Instagram in Meta's antitrust trial.Zuckerberg justified the purchase of Instagram in 2012 as it was growing faster compared to Facebook.Zuckerberg offered to teach Sheryl Sandberg how to play Settlers of Catan in a message discussing the Instagram purchase.The FTC argues that Meta's acquisitions of Instagram and WhatsApp violated competition laws and helped cement its monopoly.