I surely hope you're right in a way, about that first-mover advantage. If Steemit is willing to adapt quick enough to any opposition, in features, that Synereo may provide, then it may always have the significant lead. There are so many users on here- and Steemit pays you just for joining. It'll be interesting to see if Synereo creates any sort of similar incentive to draw users.
Thanks for the comment, as always, brianphobos!