Monopoly? In 2012, Instagram had 40 million users and no revenue[1]. Hardly a monopoly.. Everybody mocked Facebook for buying up Instagram for the amount of money they were offering. Nobody (or, perhaps, very very few amount of people) at the time thought it would become a $100bn company. You really think the government should have had the foresight to block this? Wishful thinking on your part..

[1] https://techcrunch.com/2012/04/13/instagrams-user-count-now-...