In the past, the Codex linked to several of my tutorials (not sure if those links are in the more recent docs). And, those tutorials were on sites with commercial purposes. My goal with those tutorials was purely to pass on knowledge that I learned -- of course, I benefited indirectly from links to those pages. There are many such tutorials and other forms of documentation on other sites. Even if writing docs is not entirely altruistic, they still hold value as a free resource.

I'd hate to see users and other developers miss out on valuable information over such a policy decision. It sounds like this is a preemptive decision to stop possible abuse rather than abuse that is actively taking place.