The desire to share is the driver.
I for one, have multiple posts being written at any given point of time.
I write them on my laptop using GMAIL compose. :-)
Then I post it when I think I have nothing more to add to that post.
Oh yeah! Everyday, irrespective of posting or not, I write 500 words.
On Anything.
I have a 500 word post how to write your statement of purpose for an MBA admit at an IVY league.
I have a 500 word post on what it takes to market research a new product idea.
Yes, on the days I don't feel like posting, I spend time commenting.
I spend that time between LinkedIn and Steemit.
#My@Satoshis