Yes, every Leaf has a built-in 2G modem that connects to AT&T to facilitate this service, and they don't charge for it.
It's only active in the car if you've signed up for a CarWings/NissanConnectEV account on the Nissan Owners portal (which requires verifying ownership of the car with Nissan) and valid login credentials have been entered through the car's touchscreen infotainment system. That's why the article says people who haven't signed up, or who disable their account, aren't at risk.
It's only active in the car if you've signed up for a CarWings/NissanConnectEV account on the Nissan Owners portal (which requires verifying ownership of the car with Nissan) and valid login credentials have been entered through the car's touchscreen infotainment system. That's why the article says people who haven't signed up, or who disable their account, aren't at risk.