Yeah that's a mess, but that's way too much legal baggage for me, an otherwise innocent end user, to want to take on. Especially when I personally tend to try and monetize a lot of my work.

I understand there's no way for the model to know, but it's really on Microsoft then to ensure no private, or poorly licensed or proprietary code is included in the training set. That sounds like a very tall order, but I think they're going to have to otherwise they're eventually going to run into legal problems with someone who has enough money to make it hurt for them.