It's clear that Edge Delivery Services are part of Adobe Experience Manager, meaning any commercial usage should be backed by an AEM license. However, if you follow the steps from https://www.aem.live/developer/tutorial, you can have any pet project in GitHub up and running without any request to Adobe.
Is it valid to say that Edge Delivery Services are available free of charge for pet/PoC/test projects? Are there any content request limits applied in such cases?