"Copyright would apply to the mesh, morph deltas and textures, not to the general "look and feel". so that's a pretty unlikely scenario, even if DAZ did rush out a knock off. More likely such things happen when ideas are just "in the air" and several people are working in parallel." Well, in the past, people here have claimed copyright infringement when it only looked the same. Also, its really easy to change a mesh. If I wanted to, in 5 minutes, I can take Vicky and run some modifiers to have the mesh being totally different and be able to trace back really. If people can do that, and distribute the model as their own, different companies and people such as DAZ would be more likely to go by just appearance.