Twitter is set to secure $1 billion valuation from investors before it has even made any meaningful revenues, after the micro-blogging site has just received another $100 million dollars of venture capital funding. Twitter were attempting to raise $50m but such was the demand for shares that they doubled the amount they were after. Last year Twitter rejected a $500 million offer from Facebook. How Twitter is going to make money is still open to conjecture - charging brands for extra services is one of the ideas being muted. Read more