Is there an Ethical use for Deep Fake technology?

Entrepreneur used Deep Fake to send 10K thank you videos. Is this the first ethical use case for Deep Fake technology?

A creative use case for Deep Fake technology. In “How I Sent Over 10,000 Personal Thank You Videos To My Customers in 2 Months”, this entrepreneur used technology from a company he also invests in: Windsor

How would your feelings change about a founder who sent you a thank you video, and you later discovered it was AI-generated? If this technique is found to increase repeat sales reliably, companies would arguably be remiss if they did not adopt it.

Despite the questionable sincerity, is this the first ethical use case for Deep Fake technology?