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Not sure I get why that is not created on default. When I am not doing the create-channel, an 'application' (e.g. curl or UPS) has no location to send a >payload for the device, right?My understanding is that the device registers not the application, which for example could be a web browser/user agent. It will then create channels for potentially multiple applications. In the case of usage with the Push-API, a service worker would handle the interaction with the WebPush server and hand out channels to applications. It would also be responsible for handling the inbound notifications, and can take different actions depending on the state of the webapp (post it to an open window, store it, show notification).
>Can a device have multiple monitoring channels? (e.g. channels per topic, like #Rihanna #ZZtop #ACDC ? Can a device 'un monitor' ?
I think that an application would create separate channels for topic it requires.
Not sure about unmonitoring. I've not see anything about that (unless I completely missed it)