https://www.mpgh.net/forum/showthread.php?t=1225363
Here is a quote from the official rules and guidelines:
"Selling a method that yields $10 in 2 months for $200? Overpriced."
This is considered the same. You sell something for 10 cents that has a potential profit up to the thousands, if not more. This is unofficially said leaking an eBook, but then just for 10 cents. I, myself don't bother if it stays on the market but the reason behind it is awful. You are blocking other people's sales and user services, and you are also saturating a method that doesn't have to be.