Beginning with Act! v19.1, entitlement for Act! Premium will be enforced at the .x version level (e.g. 19.0, 19.1, 19.2, etc.)
Q. Why the change for Act! Premium?
A. With the move to subscription, customers are entitled to the most current software only if they are actively subscribed. The nature of the .x releases is different under this more frequent release cadence, in that each release may contain a combination of subscriber exclusive new features, services, and product enhancements.