That's extraordinary that they'd go to that effort.
I got the late G1 figures as a kid, and recall that they all had the same standard packaging, like the Rescue Force figures, so looking up the backing on Captured Prey (http://www.capturedprey.com/store/g1...constructicons) it looks as if it was something that would have been done for reproducibility and image balance, which is a really interesting visual design choice.