Also don't forget that not all contributions are done through PRs or are actual code changes. There are folks that do tests, make MREs, organise issue reports, participate in forums … they all are also contributing: their time and efforts.
Diversity, here too, is of crucial importance. It's why some Open Source software has sublime documentation and impeccible translations, while the other is technically perfect but undecipherable. It's why some Open Source software has cute logos or appeals to professionals, while the other remains this hobby-project that no-one ever takes serious despite its' technical brilliance.
