Oracle has done it, without a paid support contract you cannot get ANY Sun patches, not even critical security patches. http://sunsolve.sun.com/search/document.do?assetkey=1-61-203648-1.

I don’t believe this is the correct way to do business, sure they stand to make a bit more money but in the grand scheme of things I can’t see it making much of a difference, only thing that will happen is that a lot of current customers will get pissed off with the new policy, and new potential customers will go a non-Sun/Oracle route ie. Linux or Windows (MS still supply free security patches).

Here is an OpenSolaris thread on the subject.