A C|Net affiliate that reviews games apparently fired one of its editorial directors (reviewers) on the request of the jilted gaming company.
Reviewer Jeff Gerstmann was allegedly fired from the GameSpot Web site after a negative review of the game Kane & Lynch, from game developer Eidos.
According to Joystiq, Eidos pulled hundreds of thousands of dollars worth of future advertising from the Web site. To placate the almighty games god, "Jeff was sacrificed."
My son used to buy the occasional computer game magazine, and the "every game is uniquely wonderful" stain that infected the editorial content was easily discernable.
This can happen at any publication, not just overly-positive game reviewing sites. One solution, to go without ads, is an alternative. But magazines that go that route, like Comsumer Reports, tend to have dreadful reviews, in my opinion.