ChatGPT starts blocking direct requests to copy an author's style

This is rich considering LLMs can't even write like an average person let alone famous authors

Ask the LLM to describe that author's style. Then start a new chat and tell it what you want it to write, giving it the author's style as a guide but without mentioning the author. While I've never used it for this particular purpose, I've used variations of this technique to get around other blocks quite well.

What about public domain authored works style?

After it stole literally every authors style in existence…

Another one of those interventions that'll just put US labs at a disadvantage. The public at large doesn't want to use models gimped so as to protect a bunch of pre-AI special interests who should adapt, not obstruct.