[Operyl]

This seems like a feature to me. It allows members of the group to keep going if the original admin/owner goes away for whatever reason. But I don’t think you get a list of emails, unless that was like one of your screening questions?

[Joeboy]

I think you're right, also I think if you're getting the option to take on admin of the group, you're already a member of the group and have access to the members list, and ability to message people on it, anyway. So other than the possibility the community you created might continue to interact when you somehow don't want them to, I'm not really sure what you're losing if somebody takes over as group admin after you leave.