It was a bribe attack as well, and I do see your point where a fully-sybil attackable system does of course have no restrictions at all in terms of the cost of account creation and those accounts giving a single actor more vote weight. I feel you are not validating my position that the stake wasn't used just to create one witness account but directly created 20 which, according to the "sybil resistant" rules or Steem, gave them full control (or "more influence in the network" if you like) of the chain. Steem is remarkably Sybil resistant in most regards. It still got Sybil attacked because one majorly staked individual was able to act as 20 accounts. That to me is a clear Sybil attack on what should be Sybil-resistant system. We have work to fix DPoS.