I don't think there are any problems with using public domain images, and even if there were I'd rather view them as challenges to overcome than obstacles to avoid.
> These are both non-free licences and we can not ship files which can only be copied with their restrictions. Why not? As far as Unsplash goes, their only restriction is not to start a competing service, which is not even remotely what we are trying to do. Surely that is a reasonable and acceptable restriction. It's not unlike the copyleft restrictions ("freedoms") of the GPL. I don't know about the Pexels license though. It purports to be free, but the wording is very vague and it's hard to gauge how equivalent it is to CC0. But I think that just means it bears a closer look, not that it should be rejected outright. On Mon, Jan 28, 2019 at 10:24 AM Jonathan Riddell <j...@jriddell.org> wrote: > On Sun, 27 Jan 2019 at 18:04, Krešimir Čohar <kco...@gmail.com> wrote: > > The licenses are: > > - the Pexels license: https://www.pexels.com/photo-license/ > > - the Unsplash license: https://unsplash.com/license, > https://en.wikipedia.org/wiki/Unsplash#License > > These are both non-free licences and we can not ship files which can > only be copied with their restrictions. > > > - the Creative Commons Zero License: > https://spdx.org/licenses/CC0-1.0.html > > We can of course ship files which are in the public domain as they are > unrestricted, it doesn't need a change to our licence policy. > > Jonathan >