Agree with you about ethics but it was a master stroke for him to buy both Instagram and WhatsApp.
He was just buying users of popular products in lieu of attracting new ones to his own.
Meta has subsequently ruined IG and seems busy working up new ways to ruin WhatsApp.
That feels like real revisionist history to me. He was late to mobile. Buying Instagram was the Hail Mary. and yes, it paid off. But a tech company with the resources of Facebook could have been where Google is today with Android if they’d acted at the right moment.
The Instagram purchase was in 2012. Who was still expecting mobile to come crashing down in the iPhone 5 era?