I wonder what sort of person is aware enough of DDoS attacks to want to buy one, savvy enough to find where to buy one, yet dumb enough to pay with PayPal. Or accept PayPal if you ran such a service. Given, it says the people running it were 16-24 and adolescent hubris knows no bounds... Maybe the customers were the same general age as the owners?
Which would limit what you could do with the money, but isn't that true of any crime related money?