@davidrevoy @mahmoudajawad
I have an idea of somewhat like "free art dataset initiative", to enable everyone to send their drawings to a common dataset under highly permissive license like wtfpl, and everyone will be allowed to use it in whatever kind of project, commercial or not.
I am lack of technical knowledge to maintain this kind of thing by myself, but I'll be glad to donate all of my drawings i can find if someone else will run this initiative.