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ICANN is Accepting Suggestions for new TLDs (for $227k) - what would you pick?
(www.theregister.com)
This is a most excellent place for technology news and articles.
Good luck restricting it for this purpose… but as you’ll see, there isn’t actually a creative commons license that is just “CC” anyway, so that wouldn’t be an issue.
Could use subdomains to specify it further, like v4.bysa.cc for all CC BY-SA 4.0 works