Twitter turns five

Happy 5th birthday Twitter.

I could be wrong but I very much doubt that when Jack Dorsey posted that very first tweet that he imagined there would be a billion tweets a week just five years later.

That's impressive growth no matter how you look at it.

When it launched Twitter employed 8 people. Now it around 400.

For me though one big question remains unanswered - how on earth they make enough money to pay those 400 hundred people?