I've heard that the average lifetime value of an individual user to Facebook is about $500 $200. If that's the case, then the earnings per user using Steemit like a regular social network would be very modest. But nonetheless I think it's a good incentive for the principle that you should be earning for the content you produce, not putting in the pockets of Facebook's shareholders.
EDIT: updated the Facebook LTV of an individual user to the correct value from the source I read it from: http://altplatform.org/2017/07/24/the-problem-with-steem-and-all-altcoins/
RE: Facebook Wallet Fridays! Show Me Yours! | E. 10 | That's Right. Think on That. A New Series for Outreach and to give FB the business for profiting off your time & surveilling you. Send this to Someone You Know!