Technically he did buy Steem, a lot of it, to be exact around 73M Steem. No one owns the blockchain and with that stake he bought Steemit as a company.
The real concern is being able to control the top witness spots and force forks that the community don't want.
If that doesn't happen, then we likely will have a lot more funding for development and marketing.
RE: SteemiTron Live Video Recap - Live Notes, My Thoughts, and TONS of Articles