SFI (Strong Future International) Marketing Group, Can I make Extra money ?

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Anybody here a member of SFI (Strong Future International) Marketing Group ? I'm a newbie overthere since 2 weeks ago and still don't understand the things where the opportunity to make extra money in SFI. They have 3 division that i'd prefer the team building but i have to buy their products every month ( I really don't want to buy anything because i'll spend higher after it charged by expedition to my country/home). what i have to do?