Looks like they do use affiliate links though, which means they have an incentive to recommend items sold on sites that will give them higher affiliate commissions.
Guess Wirecutter is in the same boat, then.
FYI Consumer Reports also uses affiliate links now. I'm of two minds about it. OTOH it creates an incentive to recommend more items and more expensive items. OTOH I like that they capture some revenue that can go to furthering their mission.