Frankly, in the beginning I had temptation to upvote posts with 99% garanteed success. I beleive I did it a few times. I am not saying that they have been posts of bad quality. But I inclined more to profit than may be to honestly choose posts of better quality from newcomers.
Now, its not the case. The Dollar Vigilante for instance, dosen't get a vote from me unless his post is truly valuable for the community IMO.
So we all need to be honest with ourselves, If we want to get a valuable platform we must very carefully upvote articles, regardless its future revenue/success.

P.S. I consider sceptic's post a valuable opinion on the issue. However, so far its revenue is 0.05$. Something is wrong in the system)