If you enjoy building it why not ask if you can do it full time backed by your employer? Personally I'd ask for a share of future profits or for a leadership r

If you enjoy building it why not ask if you can do it full time backed by your employer? Personally I'd ask for a share of future profits or for a leadership role if any future team built around the product. Definitely don't give it away, but I'm sure there is a win-win arrangement here.