Well, i doubt. About facebook, they are likely doing already what you say their doing. Their approach from what i can perceive though is one modelled after monopoly. Basically, they want to buy the world and no centralized social interface can really compete with them at this point. They basically are buying the masses. So anyone that comes up that accrues masses etc, they will simply buy e.g instagram, whatsapp, msqrd and a ton of apps out there. Plus, they are free to use in many nations including here. You can always have free facebook if you have a sim card. I doubt they can give that all up for decentralization but when they can't beat they will try something becos i know they deep down, they are interested in tech too. I dont know them but i have special gifts when it comes to understanding life and humans. So they can do some form of merge or perhaps their own blockchain, cos i doubt they will want to do like an smt token or so but whatever they do, i doubt will be fully centralized. Steemit is genius, the world has no choice but to hear of steemit because unlike steemit, nobody serves the search engines. This is as mainstream as it can get. With smts and apps for every usecase, people will be tied to steem using with their fones without even knowing it. They may not even need to. Steem's power is in that everyone is owner. If you won't let it crash and i wont let it crash cos we are incentivized not to and because overtime, we grow love for it, then it wont crash. When you are sleeping, i am awake and vice versa. We can't all sleep at once