Hay (Husky) wrote:
That's why it's so important, for projects like ours, to use a license such as BY-SA that it usable by anyone, at anytime, for any purpose without that ambiguity.
Except that it is not, the SA license ghettoizes the work just as an NC licenses does. The only difference is that they build different walls.
You can't combine a CC-BY work with a CC-BY-SA work without either imposing a SA limitation on the CC-BY work, or removing the SA limitation on the CC-BY-SA work. Which is no different to that of someone combining CC-BY-NC-SA license with a CC-BY-SA license.