Evangelizing is a complex process. It involves taking your players from advocates to ambassadors; people who strongly believe in your gamification and your product and who are willing to spread the word about its greatness. As we stated in the Preface, any successful gamification requires a strong underlying product to begin with. If your product is not top notch, no amount of incentives or gamification will encourage people to promote it in the long term.
First, you need to decide how players are going to spread the news about your gamification. You can allow your players to evangelize your gamification through multiple channels: