I don't think he did, most of the post interaction that he's got are mostly from the old forum from sourceforge, basically meant that he didn't have much interaction in this forum and I doubt a profile picture is ever going to be a thing for Satoshi, that might give some way for Internet sleuths to know who's the person behind the enigma, I mean there's not really any profile picture feature here in the forum, maybe the avatar but I don't think it's going to occur to him, even his email interactions have the default profile pictures.