Thank you for this article. I really like the idea of your model and how you highlight how it compares to the funnel model. I think it is a good idea for the EA community to focus more on the “middle” and how to keep people motivated who are not the most highly engaged. This is especially important as it is unclear what causes might be the most important in the future. Right now highest engagement is only really possible for people who are working in the currently most valued causes areas. However, those might change in the future and we might need people with different skills and perspectives and retaining those people is only possible if we offer everyone ways of participation and growth.