The problem with your idea is if manufacturers need to pay for reviews, could you really trust our opinions of the product if it was paid for?
I already don't trust it because if a reviewer speaks badly about a product he then gets struck off the review list and doesn't receive any more products.
So that aspect is already as bent as a nine bob note any way.
If we were paid for reviews it would be an incentive to give products good reviews and that is not how we work here. We will never accept money for doing a review as that is simply wrong, it would colour our opinions of the product and the review would ultimately be useless.
We wouldn't be reviewing the product, at that point it would be paid for promotion.
Yup, paying for promotion the same as Fairy Liquid pays ITV to advertise their soap during, say, Coronation Street.
Most advertising is still done by word of mouth, that wonderful age old tradition and that costs nothing. IMO computer part manufacturers rarely pay for adverts they just hand out products to people expecting them to speak highly of said product.
I mean, if you asked on this forum, for example most people would say that a good gaming GPU for all round gaming is, for example, a GTX 970. That's another sale (if said forum member is convincing enough) for Nvidia that they have made from no cost whatsoever.
And that's how it usually goes. People ask for advice on here, Tom or some one else says "I recommend this product" and they usually buy it. As such said "advice" ought to be rewarded. But no, the industry is way too greedy for that.
By my age I have a set list of manufacturers I will buy from and tbh? wouldn't buy anything else. For PSUs I use Enermax primarily and in rare occasions where I either couldn't afford the one I wanted for a project I would then default to my second choice, Seasonic (and whoever has badged them so for example I used a 750w XFX Pro model that fitted in my budget for my Hackintosh).
And no amount of advertising would change my mind. I don't like Corsair, for another example. And no amount of Tom raving on or adverts being thrown in my face would make me say "Hey you know what? I fancy a Corsair case".
So 99% of it is misdirected and a waste of time. And when you're constantly on the receiving end it does chafe one's arse cheeks.