On supporting a campaign, people will have access to a private area, where they'll be able to help the creator, just buying gadgets, products or services related to the campaign. Every amount of money spent in this area won't go towards the campaign and won't help the creator reach the goal.
It will only be a simple shop.
SoFu doesn't encourage this capitalistic behaviour, but we believe that if creators choose SoFu among other crowdfunding platforms, their aim is not profit, so this "side channel" won't be overused (the platform will try to support AND warn/teach/help creators).