Residual income means the income received from time to time for something you did in the past. This also means income from work done by other people under you in a network.
This is general related to network marketing and Multi Level Marketing. All the network companies use this term to market their concept to the people. Residual income increases with time and effort. It gets manifold over time as the number of people in a network increases.
There are various opportunities available. Some of them are residual income from books written, from acting, from property, from real estate, saving and investment programs etc. Associate programs are also a way to get it. Affiliate and reselling associates are the same residual income opportunities.
Residual income varies depending on the company and the number of people in the line. Various companies offer various percentage of residual income to its members. Some offer a small percentage and some offer very good income opportunities to its members.
It will be there for your whole life if you work hard. It is better than the linear income, because linear income comes once for hard work, but residual income...