Users can become members of ArcGIS Online organization groups in various ways: they can be invited, or added by an administrator, or they can apply. Why not an option for the group owner to let users join without applying? I would like users to be able to add map layers by setting their Search category to my group. To do that, they have to be members of my group. I don't know in advance or care who they will be. I don't want to approve their requests for membership. I want them to be able to join automatically.