I'd be fascinated to learn more of the backstory here, because the story as reported so far is baffling.
Either way Salesforce really fucked up here.
As a Sales(overpriced)force user, it's definitely something that infuriates me as someone that would both leverage their platform and METAPISTOL for our firms consulting work.
Bad on them. It could have been great PR like Netflix and their open source tools.