https://www.techdirt.com/articles/20210203/15402346174/content-moderation-case-study-github-attempts-to-moderate-banned-words-contained-hosted-repositories-2015.shtml

Summary: GitHub solidified its position as the world's foremost host of open source software not long after its formation in 2008. Twelve years after its founding, GitHub is host to 190 million repositories and 40 million users.

Even though its third-party content is software code, GitHub still polices this content for violations of its terms of service. Some violations are more overt, like possible copyright infringement. But much of it is a bit tougher to track down.