Completely agree, for example I'm using C# in my work (to create strategies & indicators). But if you need to create only 1 indi on mql, you can find a programmer or trader that knows it, instead of wasting your time.

There is no reason to share EA info (or any calculation method) that works. I mean : if it works, he'll be rich enough, so what's the reason to sell ideas? Just think about it =)