"I hear the argument everyday. That somehow, any open source project must not be very good because it does not cost anything to use it. Well, allow me to poke some holes into that theory, generally made by people who have yet to ween themselves from closed source dependency. First off, not everything in the open source world is without a profit making system. Google and Mozilla for instance, have manged to do fairly well using open source licenses. They ‘give away’ their product or service, yet seem to manage to pay the bills somehow..."
http://www.lockergnome.com/nexus/it/2007/08/20/open-source-products-just-are-not-as-good/