On the contrary, I consider the Amazon affiliate model to be one of the least bias-inducing forms of "sponsorship." People whose monetization comes from Amazon affiliate revenue don't care which brand of TV you buy since they're getting paid a percentage of all products they link to, so the can recommend based on which brand/model they think is best.

This seems a lot better than older traditional advertising models, where you have people writing reviews for TVs while the publication is getting paid advertising dollars directly from companies like Sony or LG. A classic example of this happened back in 2007, when a video game publisher was running ads for Kane and Lynch on Gamespot, which is a video games review site. Jeff Gerstmann wrote a negative review of the game which ran on the site, and he ended up getting fired as a result (as Gamespot's ownership didn't want to bite the hand that was feeding them).