You participated in this engagement challenge with your maximum effects but unfortunately despite your efforts these are waste but I cannot say that these are totally waste because this is a lesson for you that before posting you should be careful and should join at least club 5050 and then I am happy that you have information about evolvement of token issuance and token distribution that how initially STEEM was working on proof of brain mechanism and after that it was working on delegated proof of stake and now still this is a consensus mechanism followed by this blockchain which is great evolvement I wish you much success in the challenge.