"bought a vanity passport"? I've never heard that; my understanding is that he got a passport via the investment route, probably as a hedge in case he doesn't w

"bought a vanity passport"? I've never heard that; my understanding is that he got a passport via the investment route, probably as a hedge in case he doesn't want to live in US any more, or because he likes NZ. What even is a "vanity passport"? Sealand maybe?