they don't, although if they recommend you, they'll ask you for a cut of sales (affiliate program). if you say no, they'll switch their recommendation to your competitor and never review your brand again.
When they link to a product on Amazon they then ask the brand to give them an additional cut of sales? I'm surprised Amazon allows sites to double dip like that.
I called out the inherent affiliate bias issue years ago but HN cult tunnel vision didn’t want to hear it and downvote me to hell. Wirecutter is not to be trusted.