Facebook's copying Steemit already. Unfortunately, Zuck's also banning crypto from facebook after stating he wants to use blockchain, decentralize and have open source code.
I wrote an article on steemit yesterday about his hypocritical behavior.
I do think eventually Steemit can dominate facebook and many may try to buy it but may be bought by steemit and dominated by the crypto movement for decentralization and the war against censorship and ledgerless "facts"