Background: I was making a DDG userbox on Wikipedia a few minutes ago (I thought it would be kinda cool), and as we're not allowed to use Fair Use images on userspaces (see this) I went looking for a duck image on the Wikimedia Commons where there aren't any fair use images. Out of curiosity, I searched for "duckduckgo" there and found 2 DDG logos: one with a CC-by-SA license saying that an email with permission had been sent; the other with that same license uploaded by Yegg13. They're all the same, except one which is just somewhat bigger,

Problem: If that duck image is under CC-by-SA, then the Fair Use duck licence should be changed; If not, the ones on the Commons should be deleted.