That is quite an accusation. Have you tried to contact The Wirecutter about this? There are several products across The Wirecutter and Sweethome that are not linked via amazon but to walmart, home depot, etc. because their picks are not always sold by Amazon. This may be an off review, but what you’re claiming is a systemic issue.
Again this is quite an accusation against their journalistic integrity and I would be interested to see how they respond. I reserve judgement until then since everything about their site screams “don’t buy me unless you really need me” and that’s why it is one of my favorite web sites on the nets.