Build Better Customer Relationships with Subscription Options
SaaS Billing Essentials - how to add products with subscription, usage or activity-based pricing to your CRM system
Activity based billing for SugarCRM - Transverse LLC presentation from SUGARCON201212
SaaS Billing: Overcoming activity-based subscription billing challenges. SaaS University presentation from GoTransverse.com
Order-to-Cash Lifecycle in Subscription Economy #IFOFusion2015
Understanding critical processes in subscription + activity-based business models for SaaS and ISV operators