Steemit is an incorporated entity owned by Justin Sun. Has promoted decentralization in the past, but otherwise has nothing to do with it

Steem used to be a decentralized blockchain. After the successful 51% attack and evacuation of previous developers and witnesses, consensus is now controlled completely by a single actor - Justin Sun via the dev365 account. That's not speculation, anyone looking at the blockchain can see it

Essentially, steem is a social network with a token reward. That can still be a successful system, but it already has nothing to do with decentralization