Psychologically, I think it works the opposite way. When you pay money for something, you are more likely to praise and justify it, because you are invested in it. This is one of the reasons fans become so rabid - because they have invested time and money in their products, and they don't want to seem foolish for having bought an inferior product.Weaver said:The game is, of course, dreadful and in places functionally broken but I wonder if reviewers would have been a bit kinder to it if they didn't have to shell out personal money for it.
Imagine if clean air wasn't free to breathe. I'd imagine that the review scores for "fresh air" would go through the roof. But if you've lived your whole life somewhere with breathable air, you don;t even think about it.
I think the area where money mainly comes into this is the promise of future money. If somebody gives you something for free, you aren't invested in reviewing it positively or not. You already have it. However, if somebody promises future money based on an outcome (advertising revenue, etc.), then the situation changes. Likewise, if your livelihood is threatened by not taking certain actions (i.e: Kane & Lynch) then that's also a motivator.
A straight-up review copy doesn't really act that way. What does is the way that advertising revenue is what most review sites are dependent upon these days.