There is no blog on the Internet that goes without mentioning the PayPal Referral program when talking about viral growth using referrals. I have read most of them. They are informative. However, I couldn’t find an in-depth analysis that could help me plan and execute a referral program. So, in this post, I dive deep into their campaign to help you understand the inner mechanics of how it became such a successful and viral one. “A 10% daily growth rate” to “A $1.5 billion buy