The automated tool says it's in violation of some unnamed rule, but I can't figure out which. There's zero SEO, tracking, or ads, and the content is educational and G-rated.
All the other guides index just fine.
I asked for a review and they came back with the same ambiguous message. Eventually I just gave up.
Recently I split the C guide in two. I'll have to check to see if that made any difference.
But it left a bad taste, and now I don't trust Bing or DDG to provide complete results. Google's overrun with spam, but at least my stuff actually shows up on Startpage.