In a recent update, Keystone also decided to destroy a huge number of unsold hardware wallets after hackers stole the authentication key used to verify their devices.
Another big loss for them. ( that's over $2 million in estimated retail value)

Keystone to destroy more than 18,000 devices with old key
In its latest update, Keystone said the attacker exploited a vulnerability in a third-party monitoring tool used by its website to escalate privileges.
“This enabled the attacker to obtain some customer information and a key used to verify the authenticity of our devices.”
Keystone said it plans to destroy 18,835 devices in its inventory that contain the compromised key and has suspended production shipments of all devices using it.
The company said shipments would resume once it begins producing devices with a new authentication key.