[GRASS5] NVIZ license problem

The license of NVIZ does not seem to be free software.
From: src.contrib/GMSL/NVIZ2.2/LICENCE.txt

* NVIZ: multidimensional visualization for GRASS GIS
*
* Original program SG3d for GRASS4.1, 1993
* Bill Brown and David Gerdes
*
* GRASS4.2 Motif version: Bill Brown and Terrance McGhee
* GRASS4.2 and GRASS5.0 Tcl/Tk version:
* Bill Brown, Terry Baker, Mark Astley
*
* Copyright 1993, 1995, 1999:
* Bill Brown, Terry Baker, Mark Astley
*
* Modified by Jaro Hofierka 1999 for LINUX and Tcl/Tk 8.0
*
*/
/*
* The visualization library and programs, both binary and source is
* copyrighted, but available without fee for education, research and
* non-commercial purposes. Users may distribute the binary and source
* code to third parties provided that the copyright notice and this
* statement appears on all copies and that no charge is made for such
* copies. Any entity wishing to integrate all or part of the source
* code into a product for commercial use or resale, should contact the
* the authors of the software.

The last sentence renders it incompatible with free software (and with
GRASS therefor.) :frowning:

We need to contact the authors and politely ask them to make it free
software compatible with the GPL.

Is anybody still in contact with them?
  Bernhard

--
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