This is why people hate metacritic, it's never used "properly".
Out of curiosity (honest question), how would it be used "properly"?
Only my opinion of course but I see it as a convenience tool for consumers, not as a resource for the industry to use in commercial business transactions. It's like if Universal only wanted to pay royalties if a movie hit X sales figure and also had a 90% Rottentomato rating. I don't see it as a valid or intended use of the system.