SFI 18 years old and growing every day.

WHAT IS SFI'S SECRET? WHY has SFI been so successful, while thousands of other would-be competitors have fallen by the wayside over the last 10 years? WHY has SFI become arguably the #1 affiliate program in the world? We attribute it largely to the unique makeup of our affiliate program—a hybrid sales and marketing system exquisitely powered by the Internet. It probably also has a lot to do with the simple fact that SFI WORKS for so many thousands of people.