ultimately the idea of Creative Commons licenses was that they set clear rules for usage, which become meaningless if not observed. Thanks to [JohnU] for the tip.

To grow the commons of free ... re-distribute and re-use their contributions freely. Therefore, for any text, figures, or other work in any medium you hold the copyright to, by submitting it, you ...

To grow the commons of free ... re-distribute and re-use their contributions freely. Therefore, for any text, figures, or other work in any medium you hold the copyright to, by submitting it, you ...