Uhm, maybe they wrote it because they don't understand how to submit a PR? (Again, different skill sets and not wanting to learn Sumerian. That's why requiring knowledge from someone can make your life harder.)
Maybe just reaching out to them would be enough, and a courteous thing to do anyway so that they get proper credit? Heck, even if they say "No", there are still lessons to be learned.
@jrconlin @mhoye not everything revolves around github PRs. A simple email "hey I wrote this summary for you" is all it would take to get the ball rolling.
Putting the onus on the developer to reach out to the user for this is unsustainable and unrealistic. It would require constantly sifting the web to find these useful snippets.
Whoever wrote the summary just has to hit Send on one email.