I've been trying to answer that question myself. The benefits a blogger gets from steemit is not that different from Hubpages.

Here is my best attempt:
Headline -> Welcome to Steemit
Sub-head -> Discover an open community of passionate content creators. Set up a blog in minutes, make friends and earn rewards based on community appreciation.

Sorry for my short snappy replies, I was on my phone and the website is terribly slow...taking forever to write anything.