Until NoA can draft appropriate legal documentation to hold all recipients of review code accountable, this is the best play in order to protect its assets. Sure, it was only one assclown who did this, but one is enough for a publisher to crack down and tighten the ship.
It seems harsh, but people will get the message. In addition, this gives NoA a chance to recalibrate its distribution of review code. The company doesnt need to send so much out, and really should further firm up its requirements for who gets product and who doesnt.
As for the influencer who did it, if that name gets out, Nintendos wrath wont be the only thing to deal with. Other influencers affected by such a boneheaded decision would be certain to unleash anger on this individual for ruining it for them. Getting an in with NoA is hard enough; to lose it because of some nippleheads actions must be infuriating.