Today, National Geographic has a membership side with a magazine and some television side, and they generate about a billion dollars in revenue, and they're profitable. And so at the end of the year they have some bottom line profit which they can then reinvest, because they're running it as a not-for-profit in charitable endeavors. But... The real magic in National Geographic isn't how much money they have left at the end of the year. It's the fact that through their overall focus they are reaching hundreds of millions of people and educating people about the world. It just happens to be done in a business-oriented kind of way that is more sustainable.
Source: Academy of Achievement: Steve Case Interview: http://www.achievement.org/autodoc/page/cas1int-1
Contributed by: ~C4Chaos