Good question i had the same problem.
since you been an affiliate, you represent SFI and TripleClicks in your area, that is what you have to say and tell them that you will not be paid for the services you are offring.
Good to convince the person to join SFI and TripleClicks, I think you need to describe the benefits of joining SFI and TripleClicks.
and above all be honest.
I hope my response will help you.
