Because so few users actually bother to edit or build pages of their own. If this wiki had more active users to make new content, it wouldn't look like a ghost town. Basically, be the change you want to see.
Thanks. I posted a pretty long response in my discussion regarding the files. If the files(if there are multiple) for Matt are the same in both games, start there. If you feel it's necessary, see who is actually pictured and add it as trivia. If it's just a stock photo, you can leave the actual identity undisclosed.
Well, that's good to know. I wasn't as concerned with available images to use as I was with who it was being used. Like I said, it's up to you if you wanna include it as trivia. Not sure how much of the user base(as small as it is) will care who it is. For all I know, revealing who the model is could end up with trolls and what not being directed to him leading to unwanted attention. Still, it's not the 1st time someone's likeness has been used in parody that has led to unwanted attention(see cs188 for example).