The goal of a non-linear curve is to make self-votes and small voting groups less profitable. The idea is that curation is a group effort, and it should require more than one or a few votes to get higher in the ranking. The more people vote on something, the better the content is.
That's the theory at least. How well that will work with the current distribution where some have a very huge stake, and many next to nothing will have to be seen.