Just to share my settings with the rest:
I’ve setup the app to poll every 900 seconds (so, every 15 minutes).
I control my roller IO shutters using certain “sun events” triggers (that’s a separate app).
As such as soon as the nautical twilight (night) hits a flow disables the status updates entirely and the next day when the nautical twilight (morning) hits a flow resumes the status updates.
I hope this combo significantly reduces the load on the Somfy API.