I'm evaluationg using a Delegated subscription policy for our translation team, so I went to https://launchpad.net/~ubuntu-l10n-ca/+edit and tried to change it.
There I see:
Open Team
Membership is open, no approval required, and subteams can be open or closed. Any user can be a member of the team and no approval is required. Subteams can be Open, Delegated, Moderated, or Restricted. Open is a good choice for encouraging a community of contributors. Open teams cannot have PPAs.
Delegated Team
Membership is open, requires approval, and subteams can be open or closed. Any user can be a member of the team via a subteam, but team administrators approve direct memberships. Subteams can be Open, Delegated, Moderated, or Restricted. Delegated is a good choice for managing a large community of contributors. Delegated teams cannot have PPAs.
Moderated Team
Membership is closed, requires approval, and subteams must be closed. Any user can propose a new member, but team administrators approve membership. Subteams must be Moderated or Restricted. Moderated is a good choice for teams that manage things that need to be secure, like projects, branches, or PPAs, but want to encourage users to help.
Restricted Team
Membership is closed, requires approval, and subteams must be closed. Only the team's administrators can invite a user to be a member. Subteams must be Moderated or Restricted. Restricted is a good choice for teams that manage things that need to be secure, like projects, branches, or PPAs.
Sinzui:
membership UI is the same as Moderated, membership behaviour is the same as Open. Anyone may be an indirect member of the team, but an admin must approve direct membership.
Actually, its the same as moderated, I misspoke.
I think we need to be less pithy and instead say something like
'anyone can propose new members but a team adminstrator has to accept
them'.