My Blink app stays always armed. There is no need to turn this off…
Turning on or off the Blink camera(s) in ST treats the camera(s) as regular switches. It enables/disables the camera(s) individually which basically turns on or off motion.
If all cameras are off, then even if the Blink app is armed, nothing is being recorded because the camera(s) motion switch is off.
I was once in your boat until I discovered it is just simpler and much faster to just keep the Blink app (system) armed at all times.
That way, using whatever rule you like in webCoRE, you can set the motion status (on/enabled or off/disabled), re-trigger time and video length without having the additional step of arming/disarming the Blink System (Blink app).
If you “really” wanted to, instead of turning on/off the cameras individually, you could use RoyBoys Manager app’s setting to just arm/disarm the Blink camera system…However as explained above, this would trastically limit your options in ST. (Screen Shot of that setting is below)
I would strongly advise to let the Virtual Switch be the master turn all on/off switch. Again, even if the Blink app is in armed mode, it really doesn’t matter if all of the cameras motion switches are off…