It is often tempting to substitute 'smug' with a word like 'satisfied', but we must resist this unnatural temptation.

Since everyone will have weighted voting power, all you will have to do anyway to game the system is upvote anything with a lot of votes. Steadily build up your karma with this bandwagon method, and then bam spring some ad-infested blog spam upon everyone.

This can be accounted for by giving more weight to those who vote for a story early in its accumulation of points. The biggest voting power boost is given to someone who gives a story its first point.