Its not just that there are other victims. Let's say you are selling a widget for $50. The fraudster can order some of these and put them up on Amazon for $45. They have costs associated with this, including the cost of acquiring usable CC numbers, the cost of running their store, the cost of placing the fraudulent orders. I can increase the cost of the first and third in that by filtering a large number of their orders. Many of their CCs aren't going to pass the filter and many of the time they spend making the orders is wasted. Even if they have bots making the orders, there is a cost associated with it. Increase it enough and they don't really make enough for it to be worth their while.
