As a reader I absolutely appreciate that you write unique posts for each site. And you are one of a handful of bloggers I follow whose work I always look forward to reading. As far as attracting a loyal following, you're doing a great job.
As a writer/photographer I'm guilty of copy and paste publishing. There is already some divergence in the three sites (Steem/Hive/Blurt), and I expect that to grow, so the gems I create won't be seen by my entire audience if I don't share everywhere.
At the same time there are features on each chain that are unique: Appics on Steem and Hive Stock Photos, for example. And probably way more than that.
I'm pretty excited to see how this ecosystem develops, how the three sites interact, and in making a living at it. And I think it is very possible to make a living at it. It's like fractals the way opportunities for exchange (and therefore profit) are being created within each site -- there's an enormous space being created beyond the interaction between the three main nodes.
Exciting times, I think.