BY without SA is fine. ND and NC are not.
Its basically copyleft vs permissive. Non-SA works don't ensure derived works are also in the Commons.
On 2015-11-01, Paul Tagliamonte wrote:
> CC-BY-SA 3.0, CC-BY-SA 4.0 are both DFSG free.
>
> CC-BY-SA 2.5 is not.
>
> Any CC license with -NC is nonfree.
>
I already known that info, it present on
https://wiki.debian.org/DFSGLicenses
My question about:
> On Sun, Nov 1, 2015 at 6:11 AM, Oleksandr Gavenko <gavenkoa@gmail.com>
> wrote:
>>
>> describe current practice for CC-BY 3.0/4.0?
CC-BY is different from CC-BY-SA:
https://creativecommons.org/licenses/by/3.0/
https://creativecommons.org/licenses/by-sa/3.0/
--
Best regards!