Most public repos no longer accessible via code search?

Pretty much every “non-popular” repo on github (repo with < 20 stars) is no longer accessible via code-search. Public SourceGraph code search does not find my public github repo anymore - #3 by user_56942_25821 is a related issue, but this was solved by the devs manually adding to the index rather than fixing for all repos.

Is this a new systematic change, that we can only search popular repos? Do I need to upgrade to a pro plan in order to search all repos?

I have same problem.