Code is only copyrightable if it has any element of creativity.
This repo is _only_ really 7 sentences, like "Please correct spelling mistakes in the following text: " (these https://github.com/zlwaterfield/scramble/blob/2c1d9ebbd6b935...)
Everything else is uncreative, and possibly un-copyrightable, boilerplate to send those sentences to OpenAI.
All of the creative software happens on OpenAI's servers using proprietary code.
There has been evidence that better responses are sometimes provided with politeness for some LLMs.
And some people just try to be polite and it only costs a couple tokens.
I use to say please/thank you to gpt4 in 2023 all the time but it was because I was completely anthropomorphizing the model in various ways.
I suspect it would be just as easy to write a paper that saying please has absolutely no effect on the output. I feel like gpt4 is/was stochastically better on some days and at some hours than others. That might even be wrong though too. The idea that it is provable that "please" has a positive effect on the output is most likely a ridiculous idea.
Why would you even say 'please' in a prompt ?