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The lack of a signal/data gets investigated, upon which you find out the store has no power.

And that's _much_ more expensive than 1k/month. At least if you keep the ability to investigate effectively around all the time.

No it’s not. This isn’t a developing country.

A grocery chain will see maybe one outage in 10 years that is bad enough to take out the store and internet+cell phone networks.

Dispatching someone is absolutely more cost effective for these rare occasions.