About that Creative Commons license, how that works?
That really depends on what you're asking specifically.
Basic gist of things:
If you create something you own the copyright to it. Copyright gives certain exclusive rights.
Distribution rights are one of those. Derivative works is another.
The first one basically means that it's not actually legal for any of us to do, well, nearly anything with the rules you posted in this topic. We're not allowed to put them in a document, or make copies to give to friends, or include them on other websites. You probably wouldn't mind, of course, but that's not the same as it being our right to do that stuff.
The second thing, derivative works, means that we're not allowed to take your work and change it to make a new version, basically. Most people don't mind other people building stuff using their work as a base but even so it's not technically allowed.
Creative Commons licenses make that stuff clear cut and someone else makes sure all the legal stuff is solid (as most of us aren't lawyers, including me
). If you write something you can decide to make it available under a license, or many different licenses. Choose one and say what it is. That's all you need to do.
That way there's no arguing over who wrote something, no awkwardness over whether it's okay to write a new version of it, and no one can say the document was acquired illegally. It also means that if you decide that you want to repackage some rules for, say, an eReader, you can. Most people who write rules to be released love seeing them used, adapted, expanded, and so on. Seriously, I don't think a single CC document on tUGS has the "no derivatives" clause
One important note: copyright doesn't cover ideas or game mechanics. It covers the wording used to describe them but no one owns the idea that a model can move 4" per turn or 8" if they run.
Edit:
Here's a slightly longer description that may well go into a video at some point.
