Sounds like he kept pushing and got his ass canned. Just because you are there from day one doesn't make you bullet proof. Bungie is a business if there was a legit business case made to release the music as stand alone I am sure they would do it. Money is money after all. Marty failed to provide a solid plan and it was rejected so instead of going back to build a more comprehensive argument he went on a tantrum.. CEOs will only put up with so much.