Like rdj said, that really depends on what you mean by small, focused, and successful. I've had moderate success with Facebook apps (~1 million users total), b

Like rdj said, that really depends on what you mean by small, focused, and successful. I've had moderate success with Facebook apps (~1 million users total), but I haven't touched the platform in about a year, so I might be a bit out of the loop. Still, I'd be happy to answer questions.