Excellent post. Simple concept, but often overlooked. Also often overlooked is the SERIOUS power of COMMENTING. A "comment" on Steemit has, in many ways, MORE potential than a proper post, because it is quicker to produce, and people are often more likely to consume the whole comment, as opposed to a longer post. The rewards are essentially the SAME, but the productive power of comments is, in my opion, greater. In addition, when your voting power gets low you can comment as much as you want while waiting for it to replenish, and in the process you are increasing your earnings.

Also, I have been noticing the "interest" on my SP increasing at a growingly welcomed pace. However, I only just noticed that my SP was earning interest. Do you have more info on the exact nature of the SP interest? Perhaps you could write a post a out this...