A lot of time passes between when the products are shipped and when the money is withdrawn from the merchant’s bank account due to a chargeback. It can get even worse if additional fraud has occurred and the merchant did not spot it in time.
To react to fraud cases and failed fraud attempts, the typical next step is to find the common denominator. Then, merchants make some rules to prevent additional fraud of that type.
However, because merchants are reactive, this means that fraudsters tend to have an edge over merchants because merchants are always too late unless they fundamentally change the way in which fraud is prevented, which is the challenge that some startups are addressing.
Hence frausters have (and will keep) an edge over merchants.