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Yeah Steem is actually pretty active compared to the rest. You just don't see people talking about steem on facebook / twitter / etc.. because we're talking about it in here! lol

Yes, engagement levels here are quite high here since it's generally nice environment and the feeds aren't algorithm based so you get to see your feed chronologically without worry about your feed being restricted by a FB/Instagram pay wall.

I also do think not a lot of people talk Steem on Facebook since Facebook seems to downplay any posts concerning any other social network. For instance, YouTube videos seem to have a lot fewer views compared to videos hosted on Facebook itself. For Steemit on FB, some of our posts are sometimes flagged for being potential spam on their network.