I must admit, I always wondered how this network got away with churning burning for past few years (hdwallpapers3d.com, hdwallpapersdj.com, hdwallpapersinn.com, hdwallpapersuk.com, hdwallpapersfan.com, hdwallpaperszon.com, celebritywallpapers3d.com, hdwallpapersonly.com)

Always come up, they offer little value, and are often no more than a few months old, and all made for adsense pages of content ripped from other places. Moment you take one down like you did with hdwallpaperarena.com they just redirected it to hdwallpapersinn.com (which even has the same logo up still).

I just found it a bit of an an odd one given some tactics they apply are outlawed yet they seem to get by, I always see these sites crop up.