A "Funded Proposal" is simply a means of marketing an informational (or other) product such as an ebook, course or seminar to the suspect; convert them to a prospect, and to generate income to fund future advertising. In addition, the Funded Proposal helps to weed out the tire-kickers and brings a much more serious prospect to the table thereby further enhancing the probability of network marketing success.
The "secondary sale", also known by some internet marketers as the back-end sale, comes into play once the prospect has been qualified and is now a bon-fide customer. Network marketing success becomes much easier when working with clients who have made previous purchases. The secondary sale will normally take the form of product or tool that will facilitate the new network marketer in the development, management, or growth of their business.
Since the Funded Proposal, by its design, has covered most, if not all of the advertising and promotional expenses, the secondary sale will help to ensure that all expenses have been covered and that a breakeven position has been attained. In the best case scenario some level of profitability has actually been achieved.
The final step in assuring network marketing success is of course choosing the right primary product and is extremely important. The primary product will contribute the lion's share of revenues and profitability. While it is beyond the scope of this brief introduction to consider all of the factors that should be considered in selecting a primary product, the most important things to consider include choosing a product that has broad appeal and provided by a company that has a proven track record - from a management aspect, number of years in business (at least 10 - 15), and profitability.