They mention that in at least one case, most of the fraudulent purchases came from a single IP. Whomever it is has arranged a place to drop-ship the boards that will be untraceable. Perhaps they use addresses of unoccupied homes, then just pick up the packages from the doorstep. I know in the past, criminals have used fraudulent accounts at local mailbox rental stores, which they rent for a month and then dump.
Point is, there are plenty of ways to launder shipments, if you are doing it with a plan and at scale.