The vD's, in what I've seen, are classic grifters. Bill Clinton is a classic too. Have a lot of same in my current locale -- AC. People always looking for an angle, and never ceasing to exploit whatever people they meet, very creative, no core -- or a core that has been so deeply buried and obscured that they deny it and it is very difficult to reach. Lies mean nothing to them, whatever they say is a grift -- sometimes a lie sometimes the truth, whatever they think will work.
Griters do however very much appreciate observing the grifting of fellow grifters -- that's the only warm blanket they have, I think. Grifters enjoy the company of grifters and seek it out.
I don't know, I think if the VDs were true grifters, they'd be doing a much better job in their testimony. I fault them on a lot of things and wouldn't be surprised to find that they are sociopaths, but I don't see them as true "grifters."