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7 customers bought free bitcoins from Japanese exchange

A glitch in the system of Zaif led to the purchase of free bitcoins by seven customers on Tuesday during a 20-minute window last week. The customers literally had to pay no value in return. Zaif is a government registered exchange that is run by Tech Bureau Corp. The blunder also raises the question regarding Japan’s system of exchanges. Zaif’s operators have been already checked because of the risk of cyber attacks.