Digiday: Business news is changing fast. Social media has become the default homepage, which has forced sites into a constant game of catch-up to find audiences. Old-school publications are being disrupted by faster upstarts. Take Business Insider, which jumped to second place in audience among business/finance news sites in the past year. Among established players, Bloomberg Businessweek is about to announce that it just passed rival Wall Street Journal in traffic. Still, traffic is only part of the story.