First, why would you want to hide or fake a browser referrer? Answer: because you dont want CPA networks and their advertisers knowing where your traffic came/comes from (obviously)! It doesnt matter what the source of traffic is MySpace, Facebook, torrents, foreign, incentivised, etc if its against a networks/advertisers ToS, an affiliate may be get banned and even lose any accumulated earnings if he/she gets caught, so thats the reason to fake/hide a browsers referrer.
Tags: cpa, blackhat, google