That might be just to authorize initial integration.
It’s a very strange deal when you look at the details. Xfinity owns the alarm system side of it, so customers can’t add anything that would trigger an alarm, not even a contact sensor, as a DIY project. You have to pay $95 to have an Xfinity service tech come out.
You can add your own door lock, because door locks are not allowed to trigger alarms. They’re not considered part of the security system.
The works with nest is limited to the thermostat, and there is no Geo fencing at all. Anyway, it’s an interesting approach. We’ll have to see if it sells.