the details I was referring to are more along the lines of the exact list of ingredients in the potion that is the focal point of the story or something like that
That's really intriguing. Hm. If someone claims one of your prompts I'd be happy to forward the full text of your prompt and/or e-mail in case the potential author would be equally intrigued. No guarantees, but you aren't out anything by asking.
And, no, there aren't any limits on the number of prompts one person can submit at this point.