This led to a 60%increase in user signups almost immediately.
In their early days, mammoth file storing site, DropBox, had very little to spend on marketing. To counteract this, they developed a genius referral program. If an existing user referred dropbox to a friend and they signed up, the user would receive an extra 250mb of storage space, and DropBox would receive another user. This led to a 60%increase in user signups almost immediately. That’s what we call thinking outside the (drop) box.