1. Open source voice-copying software
2. At worst, create entire market of voice-fraudsters, at best, very few voice-fraudsters but very high and very real perception of fear of such
3. Become leading security experts in voice fraud detection
4. Sell software / time / services to intelligence agencies, governments, law enforcement, news networks
Ethically I'm a bit concerned with (2), but realistically the team is right --- this technology exists, it will certainly be used for good and for bad, and they're positioning themselves as the leading experts.
I'm interested to see which VCs and acquirers line up here. Applying a voice to any phrase seems useful for voice assistants (Amazon Alexa, Google Home) but I don't think that's the $B model.