“Even PayPal’s millions of dollars in bad transactions could be justified for the extensive data set they generated. “Losing a lot of money to fraud was a necessary byproduct in gathering the data needed to understand the problem and build good predictive models,” Greenfield later wrote on a personal blog. “With millions of transactions and tens of thousands of fraudulent transactions, our fraud analytics team could find subtler patterns and detect fraud more accurately.” Taken together, PayPal turned fraud from an existential threat to one of the company’s defining triumphs. It also had the unexpected benefit of thinning out the competition. “As the Russian mobsters got better and better,” Thiel said, “they got better and better at destroying all our competitors.” Thieves forced to work ever harder to fleece PayPal customers moved on to easier prey. “We’d also find that fraudsters were kind of lazy, right? They want to do just the least amount of work… So we just kind of hoped to push them off onto [our competitors],” Miller observed.”