The Salafiyin [Editor: A name for very conservative Muslims. It is however not an organization or a group as the article may suggest] adopts a certain way in trading, a way that is supposed to be Islamic, but in fact, is not. They spread in the crowded slum areas where people are, culturally, very poor, and will easily believe whatever fatwas they issue. They believe that some kinds of trade, such as grocery, are halal and other kinds are not.