SplashPlan.com is a free service itself, but has links to paid services that you can buy. In addition, you can change the affiliate link for the service so that you get credit whenever any SplashPlan member that joins under you buys the paid services.
Of course, there’s always your MLM program. Most new members will not initially join your program, true. But as they learn more about you and work with you, you will become a person with whom they trust and think of if they decide to make a change in the future.