I very much like the idea of increasing the curation reward percentage to the point where randomly cast votes, equate to the gain from pure self-voting. Can anyone work out what this would be? @calamus056? I haven't got my head around the rewards structure well enough yet.

At this point there would be no significant amount of self-voting, as it would take marginal effort to get greater profit with a cursory glance to evaluate content before up-voting it.