I think that displaying monetary values introduces a conscious effort in users in being considerate as to what they upvote and incentivizes them to think real hard about writing a good, relevant comment in order to get more STEEM.
That being said, I do worry that the posts with large monetary values so brazenly displayed would attract hackers interested in hacking the accounts of those authors. Seems almost too transparent.
RE: Is Steemit Incentifying The Wrong Behaviour With Its User Experience ?