Lots of us submit to mainstream (print or online) publications for actual publishing credits we can stick under our name. A 'published on steemit' credit doesn't do much, but a 'Published in April 2018 edition of XYZ Magazine' is worth a bit more :)
I'm still putting some of my fiction on steemit for the instant gratification, but saving my better stuff for mainstream submissions (like many of my fellow writers).
I'm sure when EOS becomes a thing, we'll be publishing there as well :)
I'm excited to see what happens next to be honest..