Unfortunately, it has one undesirable property: The function is flat (in calculus terms, it has a zero derivative) at R = 0
Can this undesirable property be observed as a user? What are the negative effects?
Some plotted curves would also be nice to illustrate the main points! Otherwise, very interesting, so thanks!
My qualitative experience is that votes for posts below $1.00 are slightly less effective than they should be. For example, I upvoted your comment, and it's still at $0.00 even though my account has a decent amount of STEEM.