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PayPal’s big challenge was to get new customers. They tried advertising. It was too expensive. They tried BD [business development] deals with big banks. Bureaucratic hilarity ensued. … the PayPal team reached an important conclusion: BD didn’t work. They needed organic, viral growth. They needed to give people money. So that’s what they did. New customers got $10 for signing up, and existing ones got $10 for referrals. Growth went exponential, and PayPal wound up paying $20 for each new customer. It felt like things were working and not working at the same time; 7 to 10 percent daily growth and 100 million users was good. No revenues and an exponentially growing cost structure were not. Things felt a little unstable. PayPal needed buzz so it could raise more capital and continue on. (Ultimately, this worked out. That does not mean it’s the best way to run a company. Indeed, it probably isn’t.)2 Thiel’s account captures both the desperation of those early days and the almost random experimentation the company resorted to in an effort to get PayPal off the ground. But in the end, the strategy worked. PayPal dramatically increased its base of consumers by incentivizing new sign-ups. Most important, the PayPal team realized that getting users to sign up wasn’t enough; they needed them to try the payment service, recognize its value to them, and become regular users. In other words, user commitment was more important than user acquisition. So PayPal designed the incentives to tip new customers into the ranks of active users. Not only did the incentive payments make joining PayPal feel riskless and attractive, they also virtually guaranteed that new users would start participating in transactions—if only to spend the $10 they’d been gifted in their accounts. PayPal’s explosive growth triggered a number of positive feedback loops. Once users experienced the convenience of PayPal, they often insisted on paying by this method when shopping online, thereby encouraging sellers to sign up. New users spread the word further, recommending PayPal to their friends. Sellers, in turn, began displaying PayPal logos on their product pages to inform buyers that they were prepared to honor this method of online payment. The sight of those logos informed more buyers of PayPal’s existence and encouraged them to sign up. PayPal also introduced a referral fee for sellers, incentivizing them to bring in still more sellers and buyers. Through these feedback loops, the PayPal network went to work on its own behalf—it served the needs of users (buyers and sellers) while spurring its own growth.
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Geoffrey G. Parker (Platform Revolution: How Networked Markets Are Transforming the Economy and How to Make Them Work for You: How Networked Markets Are Transforming the Economy―and How to Make Them Work for You)