My mistake I thought Artifex Ghostscript 9.06 was AGPL, but it's (non-A)GPL.

[Bob Eby]

That would explain no one using the GNU 9.06.0 version.

See below:

VERSION=    9.06
DISTNAME=    ghostscript-${VERSION}
CATEGORIES=    print lang
SHARED_LIBS=    gs    15.0
REVISION=    2

MASTER_SITES=    http://downloads.ghostscript.com/public/

----->LICENSE FILE EXCERPT (no COPYING file):

GPL Ghostscript is free software; you can redistribute it and/or
modify it under the terms the GNU General Public License as
published by the Free Software Foundation, either version 3
of the License, or (at your option) any later version.

----->END EXCERPT

I hear 9.07(non .0) is AGPL though and slated for the upcoming 5.5
release of the product containing the excerpted Makefile above.

Thanks,
Bob