RootFS Charges?

btw . In this introductory text :
Usage is only calculated for stopped machines
, if your machine is running 24/7 you don’t have to calculate anything, RootFS is already included on the price you already pay for running machines regardless of how much you use it.
But…
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From yesterday to today, I saw that the Time stopped usage of RootFS increased by one day, but my machine has never stopped. Does this mean it is considered a stopped machine?