This comes straight from daz3d.com:
"Terms of Use. Two Dimensional Works. Subject to the terms and conditions of this Agreement, User may (i) access, use, copy and modify the Content in the creation and presentation of two-dimensional animations and renderings, (ii) incorporate two dimensional images (including two dimensional images that simulate motion of three dimensional objects) derived by User from the Content in User’s other works, and (iii) publish, market, distribute, transfer, sell or sublicense User’s two-dimensional animations, renderings and other works; provided that User may not in any case publish, market, distribute, transfer, sell or sublicense any renderings, animations, software applications, data or any other product from which any Content, or any part thereof, or any substantially similar version of the Content can be separately exported, extracted or de-compiled into any re-distributable form or format."
Which means, whatever you render in Daz3d is owned by you, for commercial use or otherwise. You can't distribute any parts of the original content i.e. textures, models or any other files downloaded from daz3d. To use textures etc. you must buy so called interactive licence that gives you the permission to use the assets in 3d games.
What does it mean? Because you're the owner of all rendered images, there is no legal way for daz3d to stop you from monetizing your work. So unless you openly state that you're creating content with pirated assets, you're in clear, because they have no way of knowing, whether you've bought it or not. It is different, if you try to create real 3d game, though. If you won't have a licence to use the models and textures, then you're in trouble.