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I foolishly followed a sponsored link from the Amazon website to buy some sunglasses. I then had a call from my bank telling me that a company called "Dud-ec" in China had processed a charge and that it appeared to be a fraudulent transaction. Checking on the internet they seem to be correct. I informed Amazon who took the line that although they take a fee from the sponsored links they make no checks on who they sponsor. If enough people complain they remove offending links. I notice that within a couple of days the same advert appeared back on Amazon, with a different weblink. Buyer beware - it seems there is a limit to the trust you can put in the Amazon website.