[shkkmo]

That is an examples of GitHub allegedly violating the license of public repositories.

The claim that was made was that GitHub trained using private repositories and I have yet to see any evidence.

[treprinum]

The caveat you missed in that case was that the person unchecked the checkbox that would allow GitHub to use files in his repository for training.

[shkkmo]

That caveat is irrelevant as it has nothing to do with a private repository. When code is public, especially with a GPL license, it can end up in multiple repositories which may not all de-check the share check.