The certificate is in fact the license terms of their proprietary "extensions" which now does not allow to use one "license" on more than one box.
Now I see. If so, I think we need to critisize it in public media, and inform our community not use it.
I am not sure but I guess that this proprietary stuff is now essential for Caldera like the proprietary YaST is for SuSE.
I think RMS offered a nice idea when he was in China last May, i.e. make a list or table list all the so-called "Linux" distributions, and index the distances of them to our pure GNU/Linux by marks, and publish the indexing result on www.gnu.org.
According to Linux Journal, May's issue, there are 188 distributions now, so I think this work could be a little bit time consuming, but really worth to do now.
Best, Frederic