Hi, I prefer to choose Sponsoring / Advertising:
1.SFI provide a great marketing tool as advertising on Facebook, twiter, youtube and pinteres.
2.In SFI can market with some existing methods of marketing, such as banner marketing, e cards and many others.
3.With create a free website or blog can also be used as a marketing, marketing SFI's products with free ads or paid traffic, is very nice to make income, can be learned on the internet income.