You are bitching about $20 a year for a $200 device that does 24/7 monitoring of a million dollar asset?
I'm curious: do you turn off your water heater between showers? Do you power your phone down at night? Do you unplug your TV and microwave between uses? Do you manually power down your wifi router and modem when you're not actively on the internet? Do you unplug all the ac/dc converters when you're not using them? Do you disconnect the positive terminal of your car battery when you're not driving?
All these things take power. All are wasteful. And yet we leave them on because it is inconvenient not to. I realize that you, personally, may be rationing your power in your off-grid bunker, keeping time by counting your prepper stores of jerky and ammo, but the rest of us in the civilized world waste $1.60 a month on far less useful things than keeping a home security camera running 24/7.