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Message: <blockquote data-quote="prosfilaes" data-source="post: 6688516" data-attributes="member: 40166">The CC-BY license doesn't prevent anybody who uses the system from doing practically anything with it. The only thing it demands is credit. The CC-BY-SA license is excellent at producing non-generic worlds. As I said, Traveller is an example of a universe that has been ill-served by licenses that let creators keep their additions to themselves, leaving some parts of the Traveller map defined, fairly canonically, by books that are long out of print whose copyright owners are unknown or unfindable. You're conflating a lot here. If multiple creators want to use a CC-BY licensed work but have proprietary additions, that's fine. If they want to return stuff to the Commons, they can either segregate it in their book, issue it in a separate PDF or book, or simply upload it to a System Commons.I would say the CC-BY comes closer to the OGL than the CC-BY-SA; the CC-BY-SA is a much stronger share-alike license then the OGL is. The CC-BY-SA protects the community's IP. A hypothetical Star Wars using a CC-BY-SA system could certainly segregate their use of a CC-BY-SA system in one part of the book, and accept that the use of terms is protected merely by trademark law (the CC-BY-SA explicitly says it does not include any trademark rights.)Not everything is a generic system, too. If they released Torg under the CC-BY-SA, why is it problematic for the releasers that someone can't drop Star Wars or Lankmar into Torg? The CC-BY and CC-BY-SA compatibility lets you have a CC-BY system and CC-BY-SA worlds on top of that that can't be made proprietary. That's pretty much a tautology. The question is the OGL better for what you need and want, if you're the one choosing.It's an argument, but I'd say that "meaningfully compelling" makes the 3E experience more important than the PF experience. If the groups are willing to contribute back, then that's a different question; if they're willing to contribute back, then they would have contributed back under CC-BY, as well. The OGL doesn't have the teeth of the CC-BY-SA, both in wording and the way WotC neglected to enforce that clause. There are many ideas of what an Open system can be. In the Open Source world, there are the BSD operating systems that are proud that proprietary Unixes can use their code without problem. That is one theory of what an Open System can be, a system where everyone can use it and contribute back if they want. In a culture where people actually contribute back, that can work quite well.</blockquote>

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