PAYDATA Paydata is a type of file that is of value to someone. Generally they are sold to data fences who then ship the data on to the people who want it. Once downloaded paydata starts to lose its value, the longer you keep it around the less it will be worth. No one wants old data. Also, the amount of data on the market affects the price. Every piece of paydata sold lowers the price of all paydata from the same security rated hosts to fall for a temporary time.