Subscriptions are different. For early software and SaaS companies, financial systems for order-based were invaluable. These companies sold discrete products-core editions, users licenses, and additional modules. To renew, you simply sold another order. In the subscription world, you must understand the lifetime relationship with the customer—all the upsells and renewals and how they all build on one another. You also must understand the revenue, billings, and cash derived from those-again, over the entire lifetime of the customer relationship.