When I publish open source code, I don't mind if people or companies use it, or maybe even learn from it. What I don't like is feeding it into a giant plagiarism machine that is perpetuating the centralization of power on the internet.
to me plagiarism is a 100% copy of intellectual property or maybe a high percentage, like 80%+
LLMs don't store the code, only the probability chains of tokens (words). AFAIK this is not plagiarism.
I remember the later 2000s, when a German company called "Rocket Internet" was copycatting companies like AirBnB, Zappos and others. Many consider this lame and some kind of moral freeloading, it's not prohibited.