And why it will stay there.
The simple answer is, network effect. Yes, I am stating the overly obvious answer that Twitter is surviving because of it’s network. But not just any network, the fact that Twitter, like the rest of the Web is a scale-free network, is saving it.
For background on this episode of drama, Marco and Louis have some excelent posts about the most recent Twitter drama.

In the book Linked: the New Science of Networks by...