Here's some insights for what I believe to be the most popular ML repo out there right now, which is ggerganov/llama.cpp

https://devboard.gitsense.com/ggerganov/llama.cpp

The popularity of this project is kind of insane (which probably explains why it was able to raise fairly easily).

If you take a look at

https://reviews.gitsense.com/insights/github?q=merged%3Atrue...

you can see all the merged pull requests (for PRs created within the last 120 days). And if you look at the "gift icon" you can see how long the contributors have been contributing to the project for. For many, it's less than 4 months, which means many new contributors are successfully getting their changes merged.

Edit: Rejected PRs

https://reviews.gitsense.com/insights/github?q=pull-age%3A%3...

Full Disclosure: This is my tool.