Zuora Billing - RevPro Integration is in Limited Availability.
When the Zuora Billing - RevPro Integration feature is enabled in Zuora Billing (ZBILLING_INTEGRATION=Yes), only the following ratable methods can be supported when you define a POB template in RevPro:
Immediate - Upon Start Date
Immediate - Current Period
Other ratable methods are disabled because they are not applicable to the integration scenarios.