Comment by karmakaze

I'm sure there's a bump in non-spam contributions as I have submitted them and know others who have too, but I suspect it is a small fraction compared to the T-shirt spammy seekers as numbers have grown over the years.

I myself have submitted small PRs during Hacktoberfest but they were still meaningful corrections and in addition to at least 5 significant contributions. We do need better signalling. I tend to pick projects I already follow or have been tagged for Hacktoberfest.