Some of those Sept '13 images are indeed a lot better. But I think there is just going to be a limit when it comes to jpeg compression. Something like tiff or png might be a good way to go, on a site that doesn't recompress anything (either a such confirmed image upload site, or simply a file upload site like mega, that doesn't care that it's even an image). Not necessarily every day, but once in a while would be a nice treat.
Beggars can't be choosers and all, I know. But even if it is technically a 1080 or 2k pixel image, your hard work is masked by certain compression algorithms.