Oh, what a pity! My beloved wallpapers site is down for several months now, and despite all those alternatives I really miss them. Their last tweet on their Twitter account is from 2015, so I guess they’re dead. :(
Currently I’m preparing a full dump of the user submissions. If you cannot or do not want to wait, here a some torrents to respective dumps:
All images 1920 x 1080 + vote on submissions
All images 3840 x 2160 + vote on submissions
All images in maximum resolution link 1 and link 2.
Thanks to Yuri Gudilin for those torrents.