Michael Arrington, the loudmouth founder and former editor in chief of TechCrunch, is famous for investing in the start-ups that his blogs would then cover. Although he no longer runs TechCrunch, he was a partner in two investment funds during his tenure and now manages his own, CrunchFund. In other words, even when he is not a direct investor he has connections or interests in dozens of companies on his beat, and his insider knowledge helps turn profits for the firm.