There are since Poser Pro also the Pro figures. They look ugly aas hello but they were intended as base for shaping in ZBrush. Up side is they are specifically intended as resource figures and you can do with them as you see fit.

At some point also the Project Human male and female were included. Public Domain as far as I know.

Paul and Pauline were launched as merchant resources, so basically free to distribute provided changed to some degree. This was at least stated repeatedly by Steve Cooper, the Poser product manager at the time. It took Smith Micro however too much pain to word this in the documents with an appropriate degree of obfuscation and illegibility for mortals not trained in US law.