It's illegal. According to the Content EULA (the one vidi posted)
5. Any and all default CONTENT in the Character Creator is the property of and proprietary to
REALLUSION, and cannot be published in any third-party marketplace. This includes original
REALLUSION default CONTENT, CONTENT sold in REALLUSION content packs, as well as all
derivative content created by Member(s) and Vendor(s). Any user-generated content derived
from original REALLUSION content can only be sold in the REALLUSION Content Store and
Marketplace.
We will report it to Turbosquid, thanks for letting us know.