All models on the 3DWH are free to download…
you agreed to that when you signed up…
if your models are of an appropriate standard for the intended use, then people will d/l and use them for free…
when you have this ‘proof of competency’, you can use that and contact people willing to purchase models…
doing the ‘Approved Content Provider’ course and starting a Gallery here, may help in making contacts…
Manufacturers often commission sets of models that they then put on the warehouse…
there are also reputable companies such as FormFonts who sell models through their own site…
You also need to be using SU Pro to make any models you wish to one day sell…
john