Implementable ideas are valuable then I think!
Discussion
No, because a thousand people have already had the same idea. They just didn't execute it.
It might take a special mind to realize a certain executable idea...that someone else who executes it could never have thought of.
Yes. But that's worthless, because a) there are plenty of people with such ideas, and b) they are costless to produce, since they just pop up in one's head.