The thing is that if a customer claims that a product "did not live up to expectations" etc. they need to still go through the proper channels. I'm sure that a complaint could be filed with the credit card company after all that type of fraudulant action is against the cc terms of use. Point being that to claim one item is not performing well is one thing, but 10 items at least (barring any other purchases from other merchants) is another and the CC CO. would probably see it as fraud.

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