There's not always a copyright on every step of our workflows ) The very purpose of such human shape apps, is for people to export their custom humans and do whatever they want with them : a game, an anatomy course, a short film, a DAZ morph, anything.

Reallusion did not develop a tool, 3D real-time oriented, to prevent people from using their morphs anywhere else than inside CC3. The shape of the base mesh once customized does not 'belong' to reallusion, it belongs to the artist who makes it. An application that would be too exclusive and would refuse to offer export formats compatible with the rest of the 3D world would be doomed to disappear. it's pretty much because developpers want to be a part of every artist's workflow. If all those marvelous 3D apps available export as fbx, obj, etc. At the end it will just be a Genesis 8 with a shape done thanks to a third party tool.

Whether someone makes a DAZ custom morph with ZBrush (which also provides already made human bodies that G8 could be wrapped around), CC3, Poser, etc. An umpteenth Genesis 8 body morph, done with ZBrush, Character Creator, or DAZ is just and umpteenth morph made by a user who owns and therefore has the right to use all those apps to reach his artistic aim.

If the shape is made within Character Creator (CC3) because for some reason someone prefers to build patiently from head to toes his body shape using this app, and then the Genesis 8 wireframe is wrapped around that CC3 shape and brought as a morph into DAZ, there's 0 shape that belongs to nobody else than the one who made it.

Cc3 to daz