slartabartfast
So is the reviewer who admits to a potential conflict of interest more or less reliable than someone with no history at all? There is a thriving industry in creating phony online store reviews receiving revenue from manufacturers or distributors of the products or services. I expect you would find fewer of the individuals or robots working for such firms to be highly rated enough to receive evaluation copies of products than more or less reliable reviewers chosen by other shoppers. Unless the other shoppers rating the reviewers are phony reviewers or robots as well.
I'm aware that there are other kinds of phony reviews, however you can pretty much spot those immediately by clicking on the user name and seeing their review history. If for example they have 50 reviews all posted on the same day, I'm not going to trust them as far as I could throw them. But whichever way you slice it, there is no denying that someone who has received a free product in exchange for a review has been paid for that review and hence the credibility of that review has been compromised. There will be people out there who have turned receiving free items into a career, and how do you know they deliberately give good reviews in order to make themselves look more attractive as reviewers to companies which give out free stuff? After all, if I was looking to solicit reviews by giving away freebies, the last person I'd select would be a super critical Amazon reviewer who picks fault with everything.
I think what you'll also find as well is that "professional" reviewers will submit reviews of a product almost immediately after receiving it in order to get the review out of the way (and who knows, a quick review submission might be a condition of receiving the freebie). I'd much rather read a review submitted by a genuine customer who has had a chance to use the thing over a period of time to see how it works out in the long run. For instance I once bought a popular brand of humidifier which was great for the first couple of months but then developed a leak. I replaced it on warranty and the new one developed the same problem after a couple of months. So I wrote a bad review outlining this and it was quickly upvoted to the best one-star review. I think part of its popularity as a review was that I pointed out that many of the five-star reviews were written as initial impressions of the humidifier and didn't really reflect its long term performance.
So anyway, while I admit that Amazon reviews were never perfect and should always be taken as a pinch of salt, this latest trend of offering freebies for reviews has tainted their whole review system even further to the point where I'm constantly backing out of product pages because of the domination of these paid reviews. What's also significant is that Amazon does not forbid these paid reviews - how can it after all, when that's exactly what its own "Amazon Vine Program" does as well? They'd be hypocrites.