A hypothetical question: imagine a filmmaker, who had studied a lot of obviously copyrighted movies by famous renowned directors. This means he has trained his neural network using their copyrighted licensed content. Does he breach copyright when he composes and films a scene? Are visual quotes copyright theft? Homages? Did George Lucas infringe copyright when he was borrowing compositions from "Triumph of the will"?
I don't want Github or any other megacorp-backed entity abusing the open source community in the way micro$oft is here, it's as simple as that. If they wish to train it on entirely proprietary Microsoft code, then by all means go nuts, but to take the work of open source projects and to hide behind the pretense of the mathematical model behind the A"I" learning something is simply ridiculous to me.
I find it quite curious that they're not doing that (training it on their own codebase). Perhaps they're afraid of their little intelligence spitting out proprietary code verbatim like it's been shown to do many times with licensed open source code.