Looks like a gimmick to me. Sure the idea is pretty neat, heck why didnt they do that for somalian elephants,,,, is anyone listening lol... but anyways...
I would say this set was/is a bust based on Mac's comments which back up my initial thought which was: "wait, this is 2015 and they are doing 2013's?...
on top of it, from my perspective and experience, buying coins that are already lower in price than initial offerings continue to drop lower so I wouldnt be surprised we see these drop even lower in price in the near future.