I recongnized a little thing which makes harder for people to Join:
When people click on verify link after registration to a group on karrot they are linked to the all groups page and have to find the group again to make their application.
Ist possible to get directly to the group page instead of having shown all groups?
Also experienced that myself as user.
Complexity: not sure
Outcomes (or what needs to be done to move forward): solutions seems to be straightforward, so I’ll mark as ready for development