Dieter Bohn on The Verge:
> In a different world, Twitter would have stayed open to all developers, big and small, and found a way to build an ad platform that utilized Twitter’s unique insights into users’ interests but still managed to stay open to third-party developers. In theory, at least, it would have the potential to be a new AdSense, an advertising platform with a deep understanding of its users that enriches both Twitter and its developers.
That is the path a lot of the backers of [App.net](http://alpha.app.net) wish that Twitter would have taken.