CEO Dick Costolo on how his company's business works, what ad products its customers are buying, and how Twitter sells to them.
|Denny's aimed at 1% opens in New York with $300 Grand Slam|
|Slow Comcast speeds were costing Netflix customers|
|A dozen McDonald's outlets closed in Russia|
|Where is America's cheapest gas price?|
|Massive bank hack: What you need to know|