According to the interview with the author of the site (https://www.inverse.com/article/53414-this-person-does-not-exist-creator-interview https://www.inverse.c

According to the interview with the author of the site (https://www.inverse.com/article/53414-this-person-does-not-exist-creator-interview https://www.inverse.com/article/53414-this-person-does-not-e...), they're unique per page visit. As for copyright, who knows. No legal precedent that I know of.