The idea of copyleft is that you give anyone the freedom to do anything with your work, with one essential restriction: they do the same for their changes, derivative works etc. Technically attribution doesn’t have to be part of a copyleft licence, but all copyleft licences I know have a requirement to preserve copyright info.
And yes, it is popular in software (GPL, MPL, EPL), but for other types of works there is CC BY-SA 4.0 (Creative Commons Attribution-ShareAlike). If you want to copyleft books, images, videos, other forms of text… this is the way to go, IMO.
Some additional remarks, just to clarify:
Copyleft is not “giving up all copyright” - copyleft essentially “plays” the copyright system in a way that makes sure nobody is restricting access to or usage of one’s work. Using the rules of copyright against copyright, if you will.
In some jurisdictions, there is no such thing as “giving up all copyright” or “dedicating something to the public domain”. Best you can do, generally, is giving users all the same/relevant rights.
Most Creative Commons licences are not copyleft, only the ones with a ShareAlike (SA) clause. Some CC licences are also nonfree, meaning they don’t give you all the freedoms to do what you want with the work. The 2 possible nonfree clauses in CC licences are ND (no derivative works) and NC (no commercial use). NC can also be used together with a SA clause, making CC BY-SA (free) and CC BY-NC-SA (nonfree) the two CC copyleft licences.
I recently made a Jamendo account myself, and I already found an album to download (“Show it to your Mother” by Rusty Tea Makers). I find it easier to find music there than on FMA
I remember at the time there were was a thread about which was the better game between TLOU2 and Ghosts of Tsushima, with the majority going for GOT. Having played that one, personally not so sure…
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