Think about subscriber Self Service Solutions - why not

• reduce the number of inbound support calls by offering a self-service environment
• expose support knowledge to customers through FAQs and Knowledgebase.
• allow customers to update e.g. account information and manage newsletter 
• allow subscribers to update account, contact, billing and shipping address information in one
• offering self service "Subscription Management" which allows that subscribers can select and manage their subscriptions to new services