So now the criminal earned $10 each, from maybe 10% of the device owners that they managed to hit. Balance that with the cost of developing the attack, the sof

So now the criminal earned $10 each, from maybe 10% of the device owners that they managed to hit. Balance that with the cost of developing the attack, the software, the phone scripts, the infrastructure for handling the calls and money collection, ... Also, how would the attacker collect payment? Bitcoin/gift cards break the conversion rate, and credit card will get killed by chargebacks once the attack becomes well known.