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Absolutely not, they are totally different concepts and one works in the blockchain through Steem's incentive and the other only for social use without remuneration of any kind outside the blockchain.
I think the success of Facebook is that it has been adopted in a global way when there was no competing application, but with the passing of the years Facebook will have to adapt to the new times because social networks that use blockchain, when people begin to understand more globally what it is about will no longer have the activity of users so active because many will migrate to networks that if they provide incentives for the content provided by people.
In fact, every day Steemit adds up a lot of people, and although he doesn't have such a powerful and global level of plubicity, imagine having him.