This is really an amazing concept. This will attract a lot of people towards the ICO, as they are getting it for free at the first place.
Only the drawback I find is the closed system. People can get access to it only through invites.
However this is a strategy to increase the premiumness of the product, just like what OnePlus did for its initial smartphones. :D
Thank you @kingscrown for sharing about great innovative ICO.