You know, I'm actually releasing a game under almost exactly the license you describe. Here's a link: https://www.scrumbleship.com/license/

So far it's going pretty well, with users contributing back minor patches and game resources.

I imagine that RMS would hate it, but it seems like a really good stepping stone between open source and proprietary software to me, and it's very good for areas where the strict open source model works less well than proprietary development... like video games. I wish more people would use my license.

Cheers!

He gave us order out of chaos; he gave us hope where there was none. And his geometry succeeds where others fail. Mandelbrot's in heaven.