Is there a description of what "Improve the model for everyone" actually means or is it just a straight up *Dark* pattern?

It's pretty clear once you click on it:

> Allow your content to be used to train our models, which makes ChatGPT better for you and everyone who uses it. We take steps to protect your privacy. Learn more

So not in the basement behind a sign saying "Beware of the Leopard" but could also just be "Allow your content to be used to train our models: <Yes|No>".

Could be worse I guess.