You can tell them how long SFI has been in business and about Gary Carson. Also, since SFI is listed with the BBB that will also give creditability to the company as well. Then, you have the tripleclicks.com website that has over 100,000 items. A non-legit business couldn't have that many products on the website. Lastly, it's completely free to join. If it wasn't legit they would require money upfront so they could make the money and run.
