Here's an interest take at why commercial companies should document open source software: "Since Pragmatists are reluctant to move forward with a technology without supporting services, where can they find the Whole Product? To solve that problem, they need to look within their own organization and create the Whole Product themselves."

That's pretty obviously what the article is about -- if it was going to take you $10k to license closed source software, why not pitch $1500 to make the docs you need that the open source alternative doesn't have?

Though at first I thought here was an open source hacker trying his best to hide his begging for handouts, it's actually much better than that. In fact, it's a great idea. He simplifies a number of considerations (like db admin, training, etc, costs) when doing his cost-benefit analysis sample, but unsimplify and you're golden, so to speak.