The signifier is to sound and write like Sam Altman, I think. It's perfectly possible to write in a style that doesn't sound like ChatGPT, which has the tone of a collection of college admissions essays written by perky, shallow people with no life experience.
I don't think that's really true. ChatGPT has a fairly neutral style of writing. It may vary a bit on the prompt I guess.
It really does not. It has a noticeable style and affect/manner.