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Thanks for the answer @Anonsteve!

The Creative Commons BY-NC (non-commercial) license defines non-commercial as “Not primarily intended for or directed towards commercial advantage or monetary compensation”. The interesting part here is the “primary intention”. Could I claim that the primary intention was to share knowledge or entertain or something, and earning some tokens was just a fortunate side effect?

Possibly. I'm by no means an expert but if your monetary compensation was incidental and not based on an agreement of any kind, I think you'd probably be on a strong footing in court.

Also the earnings will probably be so small that any company would ever sue over that.

Still I think I will go by your first recommendation and try to always use freely licensed content and I recommend everyone else to do the same, unless Creative Commons changes their terms and explicitly mention sites where you can earn tokens with real value.

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