Make-A-Wish Foundation can really benefit from this technology by sending these "heartfelt" deepfake videos of famous celebrities and idols to dying kids, hoping to cheer them up. Is it an ethical thing to do? You be the judge!
It reminds me of the market for answering machine messages, but here you will have a large catalog of celebrities and you can create a personalized video message of them talking about you or someone you know.
A con artist could also buy that to pretend they know a certain person.
So the website would work like this: you pick a celebrity, you pick a theme/context/environment, like Skype call, handheld phone video, at home webcam, etc. and then you pick the message.
You can have actors with similar build as the target celeb acting specific scenes, to make the scenes more unique but still reusable. Payment options differs based on the exclusivity of the acted scene.
:-)