https://buddydev.com/plugins/buddypress-auto-join-groups/
Automates user joining BuddyPress groups.Admins can create multiple global lists where users will be added to the specified groups irrespective of their profile data.Admins can create multiple conditional lists where users will be added to the specified groups if they match the conditions.Admins can define matching conditions based on profile data or member type.Admins can specify one or more conditions for each list. If there is more than one condition for a list, the user much fulfil all these conditions to be considered as a match.Admins can associate any number of groups with each list.A user may match more than one list. If they do, they will be added to all groups from these lists.Admins can specify when a user should be tested for the match. You can specify the trigger as account activation, profile update or member type change.Admins can bulk synchronize users to current list. This feature searches all users and any user matching the current list condition will be added to specified groups.
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