Why not just pay someone to code up your own idea and spend your time and money marketing that?

it doesn't have to be perfect to become a successful product. Dan Shapiro has built and sold a couple of products that way and it has worked out well for him. I don't see the value in paying someone a fee (and a minimal one at that) then giving them half the company for a relatively small amount of work.

Also, your email is not in your profile, so if someone wanted to contact you, you are already making that part of the process exponentially harder