If search engines start penalizing this kind of content then the 0.1% might grow. Not to mention, most of my web search usage nowadays revolves around open-sour

If search engines start penalizing this kind of content then the 0.1% might grow. Not to mention, most of my web search usage nowadays revolves around open-source library documentation, blogs, GitHub and occasionally StackOverflow, so being constrained to the 0.1% of the non-commercial web doesn't appear to be a downside at least when it comes to searching work-related issues as a programmer.