I should add...
Not that I want to debate metaphors, but I just want to point out a major difference between SmartPlanet and a movie theater: we don't charge for entry.
Advertising pays the bills here, like it does for many other websites. If you have other suggestions ("I'd rather pay a little and have no ads at all!") we're all ears.
Online publications have been around a long time, but the business model continues to evolve.