Up to 2 people can become co-hosts and speak in a Space in addition to the 11 speakers (including the primary host) at one time. Co-host status can be lost if the co-host leaves the Space. A co-host can remove their own co-host status to become a Listener again.
Hosts can transfer primary admin rights to another co-host. If the original host drops from Space, the first co-host added will become the primary admin.
Once a co-host is added to a Space, any accounts they’ve blocked on Twitter who are in the Space will be removed from the Space.