I think the working of SFI has been adopted keeping this question in the center.
Money in SFI can be earned just by being active.
By being active I mean :
*log in every day
*complete "TO DO"s
*go through Basics
*try sponsoring
if you want to earn money faster you also have the option of PPA, where you can earn upto 11$ for each sign-up.
Now comes the tripleclicks part, which can also be called "Money Making"
Here you can make money by:
*Selling stuffs at Triple clicks
*selling items on Triple clicks
*Refere an ECA
*Try your hand at Pricebender's and save money(which means you made the saved money).
The first and foremost thing must be you must have that DEDICATION to earn and must be PATIENT.