The First Question of Any Online Business Model Should Always Be, "How does this make money for me?"
I'm not trying to teach you how to be an entrepreneur or a successful internet marketer but this is basic stuff. If it doesn't make sense - and even if you can't understand why it just "doesn't sound right" or it just "doesn't feel right" then don't throw your efforts into it.
I've been involved with various home-based business that each had their day in the sun and I was successful with every single one I became involved with and not because I was lucky, but because I looked at the basic question. If it was feasible, I went with it. If it was an MLM with no substance, I didn't.
MLM - multi-level marketing - has gotten a bad reputation because it's sometimes seen as a "give us money" game while you scramble to get people to give YOU money. YOU finally give up annoying your friends and family and quit whatever latest crackpot system, but the people you gave your money to, still have your money.
On the other side of that, successful companies who are MLM or network marketing are ones you have probably heard of like Mary Kay, Avon, and Amway.Here's a list of top MLM companies.
How does SFI make me money?
SFI is solid because it has numerous ways to advance you and make money. However, if you think you're going to get wealthy just by recruiting your friends and family to be in your downline, I can tell you from my short time that that will not do it, if you want to create a substantial income.
This is how MLM and legitimate network marketing fails for people; They think that all they have to do is amass a large number of affiliates and let them do the heavy lifting. But this fails because you only make a small % of money for each sale they do make while you make more if you make the sale. Doing BOTH is the key here!