You are not charged for pay-as-you-go ApsaraMQ for Kafka instances based on whether you use the instances.
After you purchase a pay-as-you-go ApsaraMQ for Kafka instance, the system allocates instance resources to you. Fees for a pay-as-you-go ApsaraMQ for Kafka instance are calculated based on the following formula: Total fees = Price of the instance × Service time. You are charged for a pay-as-you-go ApsaraMQ for Kafka instance even if you do not use the instance.