> Regarding discoverability, I doubt anyone finds projects through GitHub's search or discoverability features, but rather through a search engine like Google or DDG and online communities.

I've found a lot of interesting projects via GitHub search and via GitHub newsfeed (mostly because I follow people with similar interests and they star interesting projects). Google links to discussions in places like online communities, which works quite well too, but Google doesn't seem to rank GitHub very high on search results, even when looking for the exact project name.