Earlier quoted context omitted.
Innovation dies when creators can't create without someone ripping off their work against the terms they release it under. I am more hesitant to release code on GitHub under any licenses now. Even outside of GPL-esque terms, I've considered open sourcing some of my product's components under a source available but otherwise proprietary license, but if Microsoft won't adhere to popular licenses like the GPL, why would…
I played around with creating an MIT license on my GitHub that explicitly forbids Copilot and other such systems that I thought I may update my projects to, because I strongly dislike the data collection. I'm not a lawyer though. Is there a GutHub terms of agreement that covers Copilot?
It being in GitHub has not been brought up as a factor yet (by GitHub/Microsoft), AFAIK they could use code from other places with that logic, they just don't need to.