In reply to Philip Arthur Moore.

I'm working on a better handbook page to help people with GPL vetting; maybe that will help. :) It'll have negative and positive examples (no direct call-outs), plus terrible hand-drawn illustrations by me!

In my observation, the language barrier ends up meaning that folks copy license/purchasing language from other people whose work they admire. Thus if the "major players" clarify their terms, it is likely to echo throughout the ecosystem.