There are exceptions to selling 3D content on other 3D Marketplaces or similar sites if you are a member of the SquidGuild.
Like many exclusivity based reward programs, there are certain stipulations to selling on other 3D content sites. You may continue selling on other 3D content sites if:
You launched a personal website/marketplace on or before JULY 15, 2009. By directing traffic to TurboSquid, you can earn up to 80% on 3D content sold through our Affiliate Program.
You have 3D models that were removed for sale on TurboSquid or have been rejected by TurboSquid as not allowed. PLEASE NOTE that as of April 2010, TurboSquid has introduced Editorial Licensing and many products previously rejected will be allowed back on our site under this License Agreement. Please review the FAQ about this new License option.
While there are exceptions to selling 3D content on other 3D Marketplaces, you are allowed to sell 2D content such as renders and stock photography on other sites. Please note that 2D content does not include texture maps or any other 2D content that is used for 3D application.