The discussion thread is interesting - it is strongly implied that NVD3 was up publicly and widely used for ~9 months, and its open source release seemed to have been approved by management.

Are there any other notable examples where a project was 'open' for such a long period of time and then the company that claimed to own the copyrights tried to un-open it? It seems like there's a huge potential for nasty side effects when something like this happens. 9 months is long enough for lots of people to start relying on a library that's been released under a permissive license like Apache2 and then suddenly have the rug pulled out from under them because a vendor either did a terrible job of protecting their copyrights or decided to take their toys and go home.