There’s no single universal legal definition of “lifetime” for products — it’s vague and often depends on the warranty’s own wording. It can mean the buyer’s lifetime, the product’s “useful life,” or as long as the manufacturer supports it. Courts usually interpret it based on context and disclosures.

If they can enable it remotely, then they can disable it remotely at any time. The actual lifetime is up to them, and I guarantee the terms of service give them latitude to disable it under certain circumstances. Legally, “lifetime” is never as black and white as the layman might expect.

That's what the article says, and it might be true. But it is very strange to describe a one-off purchase as a subscription, lifetime or otherwise. You can't be certain of exactly what the deal is without seeing the actual contract.