(Written in March, 2022) In Web 2.0 world, it becomes more difficult for app developers to stand out as thousands of mobile apps are conquering the market. Only things that are exciting and challenging will keep users engaged. Therefore, most dapps use gamification as a strategy for user engagement and retention. What if in Web 3.0 world? Even though there are just a few Web 3.0 applications, they are still facing competition with Web 2.0 applications. Thus gamification could be a good strate...