What we haven't yet seen, at least not consistently throughout the open-source world, is how to monetize open source. That question remains constant since 2004. While the survival of open source is no longer in doubt, the survival of some open-source business models very much is. Here's a hint: the best "open-source companies" don't sell open source at all. From Google to Red Hat to Facebook to Oracle, such companies sell value around open source. That's the winning model. The trick is to figure out how to apply that principle to a particular business.