[Answered] How will you invite people to SG groups going forwards

Watch this video to see what I am talking about

Because our rank groups are restricted groups we can still send invites.

Public group – Users can join on their own or via an invite from a friend.

Restricted group – Users can join by requesting membership. They can also receive an invite from a user that has permission to add members.

Closed group – This is the most restricted group. Users can only join via invites by members who have permission to send invites. Users cannot request to join these groups.

http://steamcommunity.com/games/593110/announcements/detail/1446071197008661976