Arbitrage works like this: you sign up for a program that pays X per click. You buy clicks from a network for Y per click. Your profit is the difference between the price of X and Y taking into consideration the "fraudulent click filtering" % of your sponsor (is "shave" a harsh word?
Let's settle for "scrub" 
) Anyway, if the price you buy at is LOW enough, you still make $$$ even with tight scrubbing.
Twitter clicks are the latest focus of arbitrage money making activities. Check this case study out: http://www.shoemoney.com/2009/07/13/...itter-traffic/
Adsense/Adword arbitrage used to be nice until Google poured piss on it by tightening their Quality Score system (Adwords), this made the system unprofitable.
Let's settle for "scrub" 
Twitter clicks are the latest focus of arbitrage money making activities. Check this case study out: http://www.shoemoney.com/2009/07/13/...itter-traffic/
Adsense/Adword arbitrage used to be nice until Google poured piss on it by tightening their Quality Score system (Adwords), this made the system unprofitable.

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