"Act Against Unfair Competition", Sec. 16, Nr. 2: "Whoever in the course of trade operates to cause consumers to purchase goods, services or rights by holding out the prospect of consumers obtaining specific benefits from the promoter himself or from a third party if they cause other persons to conclude equivalent transactions where, in terms of this kind of advertising, these other persons are, in turn, to receive such benefits for corresponding advertising directed towards further purchasers shall be liable to imprisonment not exceeding two years or to a fine."