But we've only just begun! Over the next 10 years, explosive worldwide growth is projected for SFI. If you'd like to get onboard and share in our growth and profits — and you're willing to put in the time and effort to build a successful business — we'd love to work with you! There is no cost to become an SFI affiliate. We provide complete training, and all the Websites and marketing tools you'll need to get started are free.