Originally Posted by
HunkMoneyLuke
PPC invites crap traffic, such as chinese geotargeted or CJ or even bad TGP traffic. This type of traffic just doesn't covert, or converts extremely poorly. Webmasters know this so they try to monopolize it by sending it to PPC programs, even at 1/10 cent per click, sending 50000 chinese clicks to it will get you $50 but there is pretty much no way for the website owner to convert that traffic into a sale.
PPC is also subject to a lot of botnet traffic, this is fake clicks that come from automated infected computers around the world. Its hard to detect as its not specific to a location or IP address or country.
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