Earlier quoted context omitted.
I'm the same, I've seen some of my stuff pop up in the weirdest places and I was ok with it. But I understand and respect that people who published code under restrictive licenses may have a problem. The GPL is absolutely "NOT-a-free-gift" license, in both wording and spirit. If someone published something as MIT and doesn't like it being used for LLM training, yeah that person can only blame themselves. For GPL, it…
To clarify, GPL is not a free as in "free gift", but it is free as in "freedom". The giving back part is strongly related to the "freedom", not related to whether you profit from it or not.
To clarify further: "freedom" for the end user, and not the developer leveraging GPL code in their software product.