Sun has its lunch eaten by Linux and commodity hardware. Selling proprietary UNIX and super expensive hardware was a great business until Linux and (comparatively) cheap Intel boxes were good enough for more and more customers.
What I meant is, a lackadaisical approach to billing and asking for money was common at Sun for everything software related, same thing for Java which was definitely a line item.
Cost of revenue for penny-ante fluff would have been orders of magnitude greater than actual revenue. Goodwill and other benefits substantively greater.
Blaming Sun's demise on Virtualbox largess is ludicrous on its face.