They claim to not use anyone's private code, but I wouldn't trust the psychopathic C-suite at M$ not to murder kittens and human babies if it made the line go up a quarter of a percentage point, yet alone something like this.
You're free to speculate, but they have on multiple occasions said they don't train on private repos. Furthermore, there's no real incentive for them to do so, since (1) there are a lot of public repos, and (2) training on private repos opens them up to leaking things like private keys which would be a nightmare. It just doesn't make a lot of sense for them to do it.
Also, if anyone else uses private repos like I do, much of it will be "shame corner" code where it's only private because it's either half-finished or just terrible code because I wanted it to work right now.
My maintainable code gets published, my nightmares get banished to private repos so no one else thinks it's a good idea to replicate.
