Physical metaphors rarely work for software. In your scenario, someone _could've_ broken the lock because you're renting a lock from a locking agency Lock Engi

Physical metaphors rarely work for software. In your scenario, someone _could've_ broken the lock because you're renting a lock from a locking agency Lock Engine, who copied a lock design from LockPress, and LockPress decided not to mail them design flaws anymore. In the real world, vulnerable locks don't ever get fixed. At worst, locks get recalled, and you get your money back. Lock designs don't get shared freely, and if they do, there is no expectation of informing people that may have copied designs of potential flaws. If your house got broken into, you should sue Lock Engine, because they're not providing the service you're paying for. Suing LockPress for the lock design Lock Engine decided to copy wholesale is pure nonsense.