Well, in this case the deepfake is being used to amplify the authority of the product itself. It could work for Nigerian prince scams and dubious supplements. Imagine a deepfake Nigerian prince in the email! In fact the Tinder Swindler used something similar in his scams.

So I think it does matter how authentic the deepfake appears. I’m ambivalent on whether banning the technology is a good idea or even how feasible it could be, but to the extent that deepfakes are limited I do think it would be bad for scammers.