To determine how many users are subscribed to a particular list, simply query the members_table:
select count(*) from members_ where list_ = 'jazztalk' and MemberType_ = 'normal'
If you want to know the breakdown of members by type, on a list:
select MemberType_, count(*) from members_ where list_ = 'jazztalk' group by MemberType_
Lyris, Inc. Self-Serve Portal:
6401 Hollis Street., # 125
Emeryville, CA 94608
Customer Support:
1-888-LYRIS-CS (1-888-597-4727)
or
1-571-730-5259
Hours:
Monday through Friday
6:00 a.m.--6:00 p.m. PST
http://www.lyris.com/customer-service/contact-support/