Angie's List (ANGI) shares were up 24% in early afternoon trading Thursday, after the company late Wednesday posted surprise profit. That was its first quarterly profit in at least four years, and probably ever. It's never made a profit for a year. The company's sales also beat views, and it says it's paying less in marketing cost to attract new subscribers. Earlier in the day, shares were up as much as 33%, at their highest level since early