I believe that those who comment because they genuinely like something don't need that $1; it comes naturally to them, and they'll do it whether there's a reward or not. I don't know if you'd gain followers, but I'm sure there would be a lot of trashy, spammy, meaningless comments just for the sake of getting what you have to give. They would only come for the money—not all of them, but there would be many. The genuine ones will remain so, whether there's a dollar or not.

Let me tell you a story: I once said in a comment to someone I appreciate... I wish my vote was worth a lot to reward you as I think you deserve, and he replied... taking the time to read my post and comment is something not everyone does, it's very valuable. I appreciated what he said, because he is always there too.

Then... yesterday someone commented that it was a nice design to put on a truck, without even reading the title... that sucks, better not comment.