This was basically the digital merch page. Not only were there wallpapers, but there were other weird things, like music and a toolbar. It’s just wallpapers now though.
Right click one and click “Set as Desktop Background…” to use! It’s 100% free of charge, caffeine, fat, aspartame, nicotine, cocaine…
(NEW! Special 2020 wallpaper for 10-Year Anniversary of coolernow123!)