Fraud is always combatted by making it cost-prohibitive, not impossible. You could write a botnet that plays a random song via 1,000 user accounts 24/7 that loo

Fraud is always combatted by making it cost-prohibitive, not impossible. You could write a botnet that plays a random song via 1,000 user accounts 24/7 that looks imperceptible. It's the same issue Google had with black hat search results. They try to make life hard for people who break the rules and generally don't affect people who follow the rules. And as long as there's a reasonable alternative, they have a financial incentive to keep the service from onerous restrictions.