In order to make users contribute more to the application, rewards will be offered to them. Rewards could be in form of a coupon that gives a discount in a specific shop. Coupons will be given to users based on their contribution, for example how many friends they invited, on the number of their posts and comments and on their rating.
As we can see in this post (http://www.readwriteweb.com/archives/how_to_make_your_location-based_app_a_success_reward_people_for_activities.php), rewarding users in a location-based mobile applications is the new key to success.
