

There are dealerships that install aftermarket devices in their cars.
There are tutorials on YouTube: How to start your car if it has been remotely turned off by the dealership.
It ranges between disconnecting the battery and starting the car before the device from the dealership has connected to how to find it under your dash.
Well the concept of email is much more popular than the concept of a reddit style platform or even social media entirely. So information spread more easily. And nowadays people just sign up for the account “required” by the OS of their phone which mostly comes with an email address.