I was wondering about that. Is there some sort of removal process when the lease is up? If there were, folks would just do it early. Maybe there's enough enforcement/followup to discourage that while there's still outstanding debt, but perhaps it's a thing later.

It's a good point. This purchase model with IoT-enabled PAYG devices means there's a built-in vulnerability in the entire infrastructure. And unlike with a centralized utility where hypothetically some action-movie hero could rip out the one central device that shut things down, here there's millions of them everywhere.