I was one of those affiliates many years ago. I thought that SFI was just like all the other programs that I had seen and just left it alone. Then, one day, I decided, let me give this a chance...
My life hasn't been the same since. You should remain in contact with EVERYONE, per chance they become inquisitive and wish to give it a try. Imagine the benefit of having a willing affiliate who has been following you all the time, just in the background.