From Graham Spencer at MacStories, commenting on the latest Instagram numbers and that the service is only 5 years old:
"But I was really surprised to remember that Facebook acquired Instagram in April 2012, when Instagram had 'only' 40 million users. If I recall correctly, a lot of people thought Facebook was crazy to buy Instagram for $1 billion. Well, I think Facebook got the last laugh on that one, and as Forbes points out, Instagram now has more monthly active users than Twitter (316 million)."
Impressive growth, but it fits. Instagram has crafted a user experience that encourages thoughtful posts and never feels overwhelming in the way a Twitter or Facebook timeline can be. If Instagram was a paid product, I bet Instagram’s churn rate would be the lowest of any of the big social networks. They did it with a small team and weren’t afraid to grow slowly.