Buying a license
The license key
Answers the question How do you paste the key, and what happens when it runs out?
Pasting the key
The key is one long line beginning with WYRD1.. Open the license page in the dashboard, paste the whole line and save. The limit rises at once, without a restart.

How the key is checked
The server verifies the signature by itself, including on a server with no outbound access.
It fetches builds of the phone application from us regularly, but those requests travel over an anonymity network and carry nothing about the license: we cannot see how many devices you have, or whose server it is.
When the term ends
The fleet is not locked: the dashboard, the history and the device list stay where they are. Until the license is renewed the server issues no commands and stores no new data from the phones.
A warning appears in the dashboard thirty days before the end, and turns to an alarm on the day itself.