If you look at the universe of posts, some with consensus voting from many stakeholders and some with just self-voting, the ones with consensus voting will earn the predominant portion of the reward pool under a superlinear curve. Self voting will still earn something, but it isn't much. Under a linear system, self-voting earns proportionately a lot more.

Ok got you , so it reduces the vote. How is consensus voting calculated ? Wouldn't someone with intention to self upvote just create lots of sockpuppets to upvote too?

I don't really think this feature is useful to be honest as users who self vote themselves without consensus are very easy to spot and downvote.