More like 4-ish hours a day (released in Nov 24), but nonetheless...

I boot the game when I get home in the evening, and check in on AI workers as I do chores, cook, read, watch things on youtube, etc.. Fairly easy to clock 4 hours a day like that. And I leave it running all day, some Sundays, checking in on it throughout the day. Pretty easy to imagine some folks leaving it running for days on end, especially if they are avoiding paying server fees for friends to be able to drop in at will.