I guess it's because people like to recreate stuff from their favourite movies. I see it as fan art more than as a rip off. Then again, I'm known to make everything and anything into Harry Potter characters, so I'm most likely biased on this one L My own Burlap Buddy is also very heavily influenced by the little guys in "9", that's no secret either. I made it because I loved that movie and figured others might, too :) 

Is it any different than to attempt to make celebrity clones? Not to me :) (but then again, I don't know how you feel about those)

If I knew how to believably scale legs ect in a pose / morph file, I would have attempted one of the Avatar guys as well :) 

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You just can't put the words "Poserites" and "happy" in the same sentence - didn't you know that? LaurieA
  Using Poser since 2002. Currently at Version 11.1 - Win 10.