This is unclear. I have never seen an open source license that was explicit about this. Seems like a grey area. It's not even clear how often training machine

This is unclear. I have never seen an open source license that was explicit about this. Seems like a grey area. It's not even clear how often training machine learning algorithms on code results in copyright violations. CoPilot does have a setting to detect and disallow direct copying, but how well does it work? This legal uncertainty is enough that I wouldn't advise using it, but maybe people who use it will be fine?