After reading this (and comments below) I think yeah, Self-voting gives you better money... But I think it's also good to vote for others, not only good but is the best because you get more longterm benefits from them.

But I agree, if you haven't missed anything. according to these stats: self-upvoting gives you better rewards.

Wait!! did you calculate only the money you get from curation? but also the money the post you curate make too. Are the collective "profits" of you and the poster bigger than your "profits" if you self-upvote?