Because seems that is the only format between Moi and Revit who accept directly Nurbs !
DXF, DWG, DGN, SKP , SAT
It's for a French school of architecture and they want smooth forms of nurbs!
As Revit as basic nurbs they search a cool nurbs modeler for import it inside!
They have found your prog and bought several Moi :)
So will be cool that names are kept