Assuming that was directed at me...
In what way does a 'teletext based games service' have nothing to do with the games industry?
EDIT: Sorry, I ignored half your post.
I believe that any review source should be counted towards metacritic, assuming they meet a few simple criteria
* Produce a certain number of reviews per year
* Have a readership of over a certain figure
* Judge games based on the games themselves, not based on anything like the console they are on.
I don't know if cosmo meets the first criteria, but I'm sure it meets the other two. Maybe if metacritic accepted a broader range of sources we wouldn't have artificially high GTA reviews, nor artifically low Wii Music reviews