So is the idea here that the submitters figure they have a miniscule chance of sneaking through, but it costs them basically nothing to generate, and if by some miracle they win, they get a payout that's a significant amount of money in some parts of the world?

Or is it like wanna-be writers who can't tell the difference between ChatGPT output and really good writing, and figure that if they can just put their brilliant idea for a story into a prompt and have ChatGPT clean it up, their talent will finally be recognized?