What Do You Think?
People should really comment on a post, if they are actually, really interested in the content and/or in the author. This would be the natural usage. Like on any other properly working social network.
And about the Comment Rewarder service, I think that it would be the most logical solution is to remove the $0.02 USD payout threshold on the technical level (for example with a hardfork), instead of introducing services like this.
RE: Comment Rewarder! Sharing 50% of This Post's Author Rewards with Commentors