This package is abandoned and no longer maintained. The author suggests using the hypejunction/hypeinvite package instead.
- Group owners can allow members to invite other members
- Site admins can allow invitations of non-friends
- Site admins can allow invitations by email
- When invited by email, non-existing users will first have to create an account. Upon registration, invitations will be created for every group the email has been invited to before registration.