Also like how it doesn't reward obsessive / addictive behavior.
Burning additional hours and mileage won't get you that much further then a few well-timed hours a week. And staying up all night playing Ingress will cost you the way sitting awake in a chair all night won't.
I think this strongly depends on the area and the enemy faction. When they are quick to re-capture the portals, you have an incentive to immediately put in 2-3 hours again, depending on how many portals there are.
Burning additional hours and mileage won't get you that much further then a few well-timed hours a week. And staying up all night playing Ingress will cost you the way sitting awake in a chair all night won't.