Marie Pfenninger

I know people have complained about Matt Amodio's grammar but what about the way he answers? In the past when someone answers let's say it's about a person, Matt would answer with "What's Val Kilmer?" Val Kilmer is a person he should have answered with "Who's Val Kilmer" !! In the past contestants had to answer with "Who" if it was a person. How come Matt Amodio has never been penalized for answering the wrong way?? That has bothered me since he has been playing. I have watched this show for many many years and whenever a contestant answered like that they would lose money. Nothing has been said about this, why? Did the rules change recently???