At this point they've mostly run out of material, so ANY type of content is valuable. Your small personal website, why would they scrape that? It's 10.000 additional words, wouldn't want to miss that. My Github repos.... got to get buggy code from somewhere I guess.

I get what you're asking, and I'm wondering the same. Not all sources are created equally and we see the results all the time. LLMs outputs nonsense all the time, like Flock cameras containing 5 grams of gold and ounces of copper, because they are completely on critical of their sources. Perhaps there's some weights that says: Kernel mailing list, MariaDB documentation and Microsofts Learning sites are 100% trust, Reddit 50%, 4Chan 10%, but I doubt it.

Anthropic might care a little bit, seeing as they scan books, but again, is it just all books? Because other than some flowery language I don't really see the point in scanning a 1970s paperback only spy novel.