GitHub is apparently going to start using your data for model training unless you intentionally opt out of it: https://github.blog/news-insights/company-news/updates-to-github-copilot-interaction-data-usage-policy/

It looks like this is mostly just limited to interactions with Copilot itself, but I'd turn it off anyway just to be safe...

@livingshredder but that's only if you are using copilot. But if I remember correctly, last year there was also some stuff about them just stealing all the code from all repos, so: https://giveupgithub.com (at least for all projects you manage / can decide, for contributing there is often no alternative if the project is exclusively on GitHub).
Give Up GitHub - Software Freedom Conservancy

The Software Freedom Conservancy provides a non-profit home and services to Free, Libre and Open Source Software (FLOSS) projects.