Let me clarify. Gerstman was fired for the content of his review, not because the advertisers pressured the company to action; and that was my point.
When Gerstman was let go he was not allowed, contractually, to discuss the reasons behind his dismissal, so Gamespot staff was also left to speculate. Frank Provo and Alex Navarro were the only ones to leave as a result of the Gerstman-Gate scandal and both of them very adamantly stated that it wasn't so much the why of the matter, but how it was handled, what it inevitably did to the site's reputation and how company officials did little to stem their concerns -- offering up even a small explanation of what had actually happened -- or to quell the outcries of their subscribers. The sad truth being that they (Gamespot/Cnet) were also contractually obligated to keep their mouths shut as well -- here's a classic case of catch-22: they terminated Jeff Gerstman, paid him a severance, signed a contract with him that he would keep tight-lipped about the situation (as is normal in these types of terminations) and they would honor that end of the bargain as well so as not to soil his reputation.
So you see, even if they wanted to simply come out and say, "Hey, listen, we fired Jeff because he was a belligerent ass and his reviews were starting to degrade the editorial quality and integrity of our site," they couldn't.
And of course you'd sooner believe the "mighty dollar" was the main factor here, it's simply the more intriguing camp to join; the grassy knoll, the smoking gun, call it what you will, people are more inclined to buy into the conspiracy rather than look at the evidence objectively and make a logical assessment.
The problem with this whole situation is that we forget the importance of consistency; if this was Gamespot's main goal, why then would they have allowed similar (albeit more tactful) reviews of games which they'd received advertising revenue for go unedited?
Crackdown, Need for Speed, Dark Sector, Skate, Call of Juaraz, Shadowrun; these are just a few examples of other titles/series that had ads which ran on Gamespot's site, all of them received below average scores, some in the low 7's and 6's, and all of them from arguably more influential, higher-paying publishers than Eidos.
Your opinion is your own, and I can respect that, but let me say that I definitely don't want to get into a long, drawn out debate about this subject, considering it's relatively old news and that it will go nowhere since there's still no definable explanation as to what happened.