I think I've actually earned more from making comments then on my blog posts. Also don't underestimate how many followers you could gain from making good comments.
Whereas your blog posts usually disappear pretty quickly from the Steemit front pages (New & Hot), comments usually get seen way more often. Especially if you comment on popular blog posts.
Absolutely wonderful description.. people generally dont realize that with commenting, there is big money involved. Plus comments are wayyy wayyy better when it comes to advertising yourself.. they are much better for visibilty than blog posts..