Probably I'm not the first to request this, but how feasible would it be to make the silhouettes searchable by creator or by license? This came to mind because CC BY-NC and CC BY-SA images are unusable in many journals. It would be nice to have a fast, easy way to sort out the CC BY and CCo images, or filter search results by license. Also to sort by creator if you find someone whose work you really like, or if you're simply curious about who's submitted what.
Thanks for your time and consideration.