Publishers & Metacritic: Who’s to Blame?

Recently it was made aware that Obsidian Entertainment, the company responsible for the excellent game Fallout: New Vegas, was not given any royalties or bonuses for the game because the game failed to garner a high enough score on aggregate review site Metacritic. Aside from this being a terrible story for the talented developers over at Obsidian, it is also a ludicrous practice for a publisher to utilize. There has been a bevy of articles and opinion pieces on the situation, with a lot of the argument aimed at Metacritic. But is Metacritic really to blame, or should the pointed finger of the outraged public be directed towards someone else?