It's not all that unique, it's just that "daily car rentals" are pretty amorphous. Similar to how the car wash was the go-to money launder on Breaking Bad.
If you have some other eComm platform telling T-shirts or whatever, sure there could be fake orders but it wouldn't be all that hard to track down that these THINGS were never sent/made. But anything involving a service...well, it's much harder to prove that those things DIDN'T happen.