The difference between linear income and residual income is that with residual income, your productive time is leveraged. That is, your time spent at work becomes increasingly worth more and more. So if time is worth money, leveraged time has no upper limit of its worth. And they did it using something called Referral Based marketing. It matters not that you be close friends, only that you know and have respect for one another.
Friends commune and associate with one another.
They do not sell. They share information and empower one another. So if Referral Based Marketing should ever feel like selling, you are probably going at it wrong. It's just human nature to share good news, especially when that news can be SO life-changing. What makes this all the more exciting is watching the effect of our referrals grow.