While I certainly think it's fine (and indeed, good, if what you are making is of value to the larger community) if you use whatever skills you have to make something and sell it here, I'd like to point out that this forum is really supposed to be about sharing information, not hiding it, and certainly not about holding information ransom for your own personal gain.

Yay for commerce. Boo for coercion. Just help a brother out, will ya?