A product whose primary appeal is to people who make and consume news is, ultimately, a niche product. The majority of people who Twitter might ever reach have

A product whose primary appeal is to people who make and consume news is, ultimately, a niche product. The majority of people who Twitter might ever reach have seen it and realized it's not for them. Twitter could absolutely be a valuable property, but it's never going to have the scale/reach of Google Search or Facebook.