Here is what I have been able to gather, from reading Steve St. Angelo's website, www.srsroccoreport.com:
Suppose you have the opportunity and the means to create a gold mine, and decide to undertake the challenge; you invest in the building and installations of the gold mine, and in all the related salaries to carry out the building of the mine, by paying for all expenses in gold; finally the gold mine is selling the gold it produces, in exchange for dollars. So now you have an abundant income in dollars, because your mine has been a successful venture. Hurray!
Read more here