Unless the product is really poor leaks do not do damage, most companies just don't want to have to explain to people the difference between the first concept and final product. If the concept shoes chrome parts, but then the final product substitued gray people will be disapointed and might call in. A few POTC sets had issues with chrome gold and the unshiny gold but lego set out the parts shown on the box.
I really do want to know more about the helicopter.