I believe many, if not most, people join thinking they are in a get-rich scheme. It doesn't seem to occur to them that they are starting a real business and thus don't treat it as such!
Although I certainly understand your frustration, I support the other answers. Never give up. Stay in contact with everyone and by your perserverance you show that SFI is trustworthy and far more than a fly-by-night.
I wish you all the best,
Karin