Does the Azure.OnMessage client generate a paid request for empty queues?

You can subscribe to asynchronous updates from Azure themes and queues using the SubscriptionClient / QueueClient call .OnMessage, which is supposed to create a separate thread by polling the topic / queue with default settings and will call a specific callback if it receives something.

The Azure website says receiving a message is a paid action, which is understandable. However, it is not clear if each of these survey requests is considered paid, even if they do not return anything, that is, there are no pending messages in the expected queue.