1. The document discusses various compensation plan structures for multi-level marketing (MLM) companies, including binary, unilevel, stair-step, hybrid, and matrix plans. 2. Worldwide data from 1988-2002 is presented showing that 59% of MLM companies used a binary compensation plan structure, while other structures like unilevel and stair-step were less common. 3. The concept of return on investment (ROI) is explained through examples showing how income generated from a MLM business can yield different ROI percentages depending on the initial investment and earnings.