Preset settings
If you want to quickly set up invitations without messing with lots of settings, there are now four presets you can use:
Anyone can join with or without an invitation, and all users can invite as many people as they like
Signup is just for invited people, and all users can invite as many people as they like
Signup is just for invited people, and all users who have been registered for 30 days or more can invite as many people as they like
Signup is just for invited people, and all users who have been registered for 30 days or more can invite up to 10 people
Or you can use your own custom settings just as before.