Earlier quoted context omitted.
Sadly very few authors seem to acknowledge or even know that github wiki pages are not indexed by search engines so if it wasn't for third-party sites like github-wiki-see.page (which could stop working at any time) their contents would be undiscoverable by the very same people they are usually intended...
What? That's crazy! Does Github block indexing?
I don't see anything here about wiki specifically but maybe one of the rules hits wiki pages?