Im going from an olympic lifter point of view. I actually tried it when I competed, also tried i with bands and it screwed up my snatch. You do not want to extend the lenght of the force production (hang with the pull) you want to create maximum Howard momentum then rapidly go down into the full snatch position.
To play devils advocate, one olympic lifter uses it but he is one out of hundreds it thousands and none of the true elite use the method. And the fact that the chinese do not use it, while they use tons of unconventional methods means something.
. For muscle can it be used? Maybe but just because you can make a logical argument doesn't mean that it will work in real life. I find that most people :
1) have a hard time mastering a proper snatch high pull as is without adding chains
2) are not advanced enough to think about usine them