editing... posting on a blog so that this hopefully won't get deleted... here's the story: http://entropiatrash.wordpress.com/2011/03/07/calypto-is-behind-httpwww-entropiamarketing-com/
There was a guy mass spamming at swamp for that service of Zehx or whatever using one of those urls to replace the complete url with referral etc in it. Think his name was Kensh.... Rly annoying but couldn't find anything illegal about it rly.