Thank you for your keen and clear answer. Anyway even being an absolute fan of Larimer's general goals for humanity and definitely considering him one if not the major "blockchain thinker", of present times, on the way to provide a blockchain technology able to be the future of the internet itself. My old believes as a bitcoin miner get my into hard times in truly understanding the value of DPOS. It is good that the miners (the witnesses) don't compete between themselves, but to become a witness is the big challenge. I would deem interesting that the voters for the witnesses get a reward for their vote, a little bit like the bitcoin miners who join a pool and get a share of whatever block a miner of the pool has the luck to produce, . i.e. I am trying to figure out the would-be functioning of a Steem mining pool