Can subscribers be added to a list before it has been approved?
Apparently there was a fix for this, but according to https://user.riseup.net/ticket/825977 on 8/7/08, the list naturfreund_innen-berlin@lists.riseup.net has 32 subscribers but hasn't been activated yet.
(from redmine: created on 2008-08-07, closed on 2010-10-31)