Each day I get a list of top performing offers from my Hydra AM, and consistently for about 3 months, Cash4Gold has been #1 - #2 top earning offer.
One of you fuckers is banking hardcore on this offer. The search volume is clearly not there to make this a high performing offer, so this one is a big earner either through web traffic (banners) or bulk email (HIGHLY likely).
I'm assuming they are buying generic lists and just mailbombing them. My GF has a spam hotmail account and she gets the C4G offer daily, prob 3 - 5 times a day.