I do lose at least a bit of trust in anyone with affiliate links or ads, at least as far as their opinion of those products/companies are concerned. Who wants reviews of anything when the review is clouded by money? I'd much rather pay directly for the information.
So many forms of reviews are completely worthless because this system has got out of hand. Amateur video game reviewers get the games for free, but if they really rip a game, the publisher cuts them off in the future. Wonder why almost no game gets rated less than 70%? And on, and on, and on. If you want the worst of it, the incestuous world of affiliate marketing is where to look. Say you want to buy a program to learn how to start... ok, you heard of one, now you look it up on google to see if it's legit. EVERY SINGLE RESULT FOR 100 PAGES will be some guy pretending to review it, but really just promoting it. They even use titles like this "Affiliate marketing scam," and the article says, "Is it a scam? Let's investigate... no. Sign up here <aff link>" Basically, within that world, it is impossible for a beginner to separate the wheat from the chaff. Outside of AM, it's not as bad, but it's getting there.