> They simply got big due to first mover advantages, Neither facebook nor google were first movers. They actually joined the game at a tome when there were est

> They simply got big due to first mover advantages, Neither facebook nor google were first movers. They actually joined the game at a tome when there were established competitors. But they beat them with a much better execution (and other key ingredients such as those you mentioned) which markets rewarded. Then they started buying off possible threats, effectively blocking late starters as they themselves were, to the point where they became monopolies and, frankly, a nuisance to customers and society.