If you have a team members that has a negative attitude about SFI maybe try to explain and show to them your achievements in SFI so that they can prove it that SFI is real deal.Be patient by motivating them so they will understand well on how to build thier own business in that way maybe they will turn to a positive one.Never give up on explaining for them.Wish my answer can help.
KEEP AIMING HIGH and Dream Big