Just get any recent database leak for that on any of the numerous sites trading breaches / leaks. Voice samples can be useful for scammers of course, but the victim needs to be rich enough to justify the attack (and it is easy enough to get a voice sample anyway if you have the phone number). Etc.

It's a new source. Of course there's a different way to get that info too. It's like saying "we had one leak, there's no value in any new data leaks ever".