Abstract: There is provided a system for rewarding economic activities in a virtual space using a reward-based mobile advertising application. The system forms the virtual organization with a plurality of branches, manages the virtual organization and an organizational structure on a branch unit basis, changes a number of branches according to the number of members, limits a number of members belonging to each branch, and limits a number of members at each position. In addition, the system evaluates performance of the members based on a performance-related activity criteria, and evaluates loyalty of the members based on a loyalty-related activity criteria. Further, the system rewards each member according to a result of the evaluated performance and loyalty thereof.