Except for smaller users that do not get seen,self voting can be good. Most people do not care about self voting when it isn't abusive i.e. when you upvote for less than a dollar because that has almost no affect on the value of other peoples upvotes/flags; when you upvote yourself at $70 you actually lower the value of other peoples votes in a way that is detectable, this also lowers the rewards on others posts etc.

What we want is haejin to not upvote himself and for ranchoralexo to stop upvoting him. He would still make 100-200 SBD per post which is better than most but it wouldn't be abusive.