I can recall in my early steemit days when my comments were earning MORE than my actual posts.
I still have some comments earning well, but it varies from day to day.
I used to have a weekly earnings quota I wanted to meet and when I surpassed $25/week, I set the level to $50/week... I have stopped with meeting my quota and focus on not only quality content but also quality comments. There is a difference and I am THRILLED to see how many members have taken comments more seriously. I wrote a post just last week about how steemians are commenting...and MAKING real comments; no drive-bys and how spam is becoming less and less.
And that makes sense.
To start, when we are new, we are not known so our posts are floating around unattached. They do not get any views. However, by commenting, we are relying on the author's following.
Also, we usually do not attract people with much SP when we first start. In the comment section, you find all kinds of SP there. It helps to be where the heavy hitters are.