I have a very elegant solution for things like this. I review games, but I'm not what you would call a journalist, I'm more of a comedian and fiction writer. So the way I go about it is that I have different characters do different things. I've got a news guy, a reviewer guy, a marketing guy, an investigative reporter, and a couple of others, all played by me, but distinctly separate.
There can't be any allegations that the reviews are tainted, because they're written by a fictional character. How can you bribe someone that's not real?
Sure, they could bribe me (please do) but the character that reviews games is so cynical and jaded that it doesn't even phase him. And if that ever happens, unlikely as it sounds, one of the other characters would undoubtedly get wind of it. I'm actually planning on doing a shakedown on a news show early next year, but don't tell him, I want it to be a surprise. Now, this may all sound insane, but keep in mind, I may just be crazy enough to always be honest, and also a helicopter.