I've seen plenty of people accuse various websites of allowing publsihers to buy higher than deserved review scores, but is this a thing that actually happens?
It's just that on any given day, just about every videogame website on the internet will be accused of being biased either towards or against Nintendo, Sony, and Microsoft all at the same time by readers who happen to be fans of their respective consoles. Since that's not possible, the far more logical conclusion to draw from those accusations is that the only bias' they're reflective of are the accuser's own.
That's kind of how I take the accusation that publishers pay reviewers to inflate their review scores. I'm not denying that we've caught publishers doing some shady stuff over the years, and the almost incestuous relationship between the industry and the videogames press with respect to the latter's reliance on the former for advertising revenue is cause for concern. However, unless we have proof that this has happened, and that it still is happening, I'm a great deal more inclined to write this particular accusation off as coming from folks who don't know how to deal with it when a game that they were predisposed to like didn't get the score they expected it to get, or who otherwise possess a tenuous understanding of the concept of opinion.
Considering that I've witnessed plenty of incidences of gamers going ape-spit over low-scoring reviews for games that went live well in advance of their street-dates, and also considering that I've seen people justify accusing critics of being bought and paid for by publishers for no other reason than because the critics in question liked a given game more than the accuser did, I'm pretty confident that's what it is rather than any grand, far-reaching conspiracy by the industry to artificially inflate review scores.
As far as what Nintendo did goes, I'm not sure how you could possibly draw a comparison between it and buying inflated review scores. It's not remotely comparable. Granted, how the company went about it was stupid, but they were merely doing what they thought was necessary in order to protect the integrity of their intellectual-property, as is their prerogative. While they'd be smart to go about it more carefully in the future, there's nothing illegal or even particularly shady about it. You don't have to like what they did, of course, but I feel like suggesting that they not be allowed to protect their IP is a little silly if I'm being honest.