Next generation mobile devices will allow users to share and pass information within anonymous groups of people in an ad hoc manner. This will smooth the path for many kinds of new mobile commerce applications. In this paper we present a mobile commerce application that is part of the iClouds research project. It allows the dissemination of digital advertisements among interested mobile users. To create an incentive, an anonymous bonus point system rewards users who help to carry an advertisement from a merchant to a customer. This work includes a formal description of our bonus point model, a thorough discussion of the security goals, their realization and some first results about crypto-operation runtime behavior on a state-of-the-art PDA. Keywords ad hoc networking, anonymous, bonus point system, iClouds, mobile commerce