In Space, No One Can Read Your Credits

About ten years or so ago, McFarlane Toys put out a series of 3D movie "posters," which recreated famous film ads with sculpted details. I bought this ALIEN one back in the day. It's kind of cool, as the egg in the center lights up.

Recently I was digging through some stuff and found it again. I honestly forgot I even had it (a sure sign that one has too much crap!). As I was looking for a place to finally hang it, I noticed something odd...

Not sure if you can see it, but check out the credits at the bottom. Instead of listing actors Tom Skerritt, Sigourney Weaver, Veronica Cartwright, John Hurt and Ian Holm, it says, "Captain A.J. Dallas," "Warrant Officer E.L. Ripley," "Navigator J.M. Lambert," "Engineer G.W. Kane" and "Science Office Ash."

What the hell? Why would it list the CHARACTER names instead of the actors? I've never seen anything remotely like that before. Was this a royalty thing? I know that companies have to pay licensing fees to use an actor's LIKENESS, but I've never heard of not being able to simply use their name before. 

Heck, their real names are on the real movie poster, so why can't they use it on this recreation?

It's a mystery!