What interest groups have the hardest time keeping members?

Interest groups that often struggle to retain members are those that lack clear, direct benefits for individual members, such as public interest groups or those advocating for broad social causes. Additionally, groups with high membership fees or those that require significant time commitments may deter ongoing participation. Furthermore, organizations that face internal conflict or fail to effectively communicate their goals can also see high turnover rates. Ultimately, the challenge lies in maintaining member engagement and demonstrating tangible benefits.