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In social commerce services, if the purchase condition for the minimum number of ordered users is satisfied, customers can get a great deal of discount for the corresponding products. The convergence of D2D communications and the social commerce services may create a synergistic effect because the D2D user can spontaneously relay the advertisement messages to their neighbors. Accordingly, we here propose Wi-Fi Direct based voluntary advertisement dissemination scenario and algorithm (VADA) for social commerce services. By using our proposed VADA algorithm, the small business owners are able to transmit advertisement messages to many local D2D users cost-effectively. Through intensive simulations, we evaluate the performance excellency of our proposed algorithm with respect to total number of successfully received users, average number of relay users, and transmission efficiency compared …