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RE: GPL GPL is an acronym for GNU Public License. It is the standard license WordPress uses for Open Source licensing https://wordpress.org/about/license/. The GPL is a ‘copyleft’ license https://www.gnu.org/licenses/copyleft.en.html. This means that derivative work can only be distributed under the same license terms. This is in distinction to permissive free software licenses, of which the BSD license and the MIT License are widely used examples.-Compatibility
I was thinking to write a post about it, but I chose the list instead.
As I was going over some license *issues* with my very own work, it turns
out that sites like http://unsplash.com/ are completely unreliable and
probably not the best choice to use images from.
The site itself does not have an explicit license, other than a line where
it says “All photos CC0”, which is definitely not enough.
Should we “police” this? You bet!
All right, so I took few extra steps and came to conclusion that the
original license and the license http://unsplash.com/ advertise are
In most cases the license are either not CC0, or they require a special
permission by the owner and in some other cases released under CC and we
all know that CC alone is not GPL-Compatible. Not to mention that sites
lists images from people that don’t even exist.
When that special permission is granted the source needs to have that in
writing, otherwise “All photos CC0” means nothing to us.