I can say, with absolute certainty, that is not the norm.
For every sale they make, there are countless others they don't. And they still have to put in the time.
I've gone through many realtors looking for a house, all of them gave me hours of their time and didn't see a penny in return.
That said, I don't think realtors are necessary and we should push the idea that people shouldn't use them unless they think they need to.
What comments? Are you trying to manufacture outrage again?