There's something obvious that people seem (to me anyway) to be missing, The original question was about designing a game using the figures & distributing that, not actually distributing the figures themselves.

Unless I'm reading the original post wrong then any figure usable in Poser unless stated in it's EULA is ok for that purpose as long as the original meshes/textures are not distributed in a form that others can access & copy.

Windows 7 64Bit
Poser Pro 2010 SR1