This is really audacious now: they release software under a license that explicitly permits free distribution and use. This fact is actually well-known in the industry - so one would think that this license choice by SCO for their own distribution was deliberate. Nobody forced SCO to distribute their distribution. At that time, the GPL was quite convenient for them. But now they simply sit down and declare the GPL unilaterally (and retroactively) invalid. Idiots.
At heise online news there's the original article.