Questions about Request Posts

I am currently looking into the request posts in 3D ContentCentral.

http://www.3dcontentcentral.com/Requests.aspx

I am wondering how the request works.

Can I just click on any post and say I can create 3D models for them? or the models have to been created by the suppliers?

Can I ask people to pay me like a freelancer while I am creating the models?

Solidworks3d Contentcentral