Yes, I guess you could say all creations begin centralized by their creators. I would say though that the witnesses were elected by the community on Steem, and after the airdrop is finished all changes to the blockchain will be made by community elected witnesses.
RE: This is called the HIVE AirDrop Exclusion List. (HIVE 에어드랍 제외 대상 목록이라고 합니다.)