How does this work?
Let us consider a simple example. Suppose we have 5 people between whom the prize pool. We call them conditional A, B, C, D, and F.
They each bought one unit of product X, and they all participate in the campaign advertising of the prize. Participate in the draw of 5 event purchase item X. That is, the same A, b, C, D, and F.
Everyone has a chance to win 20%, that is 1: 5.
But suppose one of them, for example, C, is a referral. In this case, his participation in the prize draw is automatically doubled, and the odds increase without additional investments. His number will be repeated in the system of the drawing, and the list of participants will be the following:
A, B, C, D, F
That is, the probability of receiving a prize from C now is 33.3% or 1: 3.