For me, the main obstacle isn't reading and commenting, but to put out a reward. This month I owe someone all my earnings. Therefore, I won't be able to offer any reward. Plus I don't know how to do it form the community account and I don't know what else besides the contest related text should go into the contest post. I usually see all kinds of other images, links.

What I could have done is to give all the money from the contest's main post to the winner or winners. But shouldn't the reward be declared upfront?