That would certainly impose a lot more "work" on you in evaluating all the comments, so that you could decide which one is the best and which one deserves a "fat" award.
(One Hiver who launched topcomment has a team behind him that does the selection of comments, but on the entire platform).

If word got around, I believe that the number of commenters would increase, and the question is whether any new ones would appear, who make meaningful comments, or would you get another 50 of them with "Great boss" 🙂
I usually make comments on posts when the topic interests me (and when I find time), and I think they are OK.

Considering that for every comment I get some part of the dollar from you, I would agree with the experiment. To have 10 comments with 0 if there is a chance that my 11th comment will be rewarded with a whole $.
Surely such an experiment would lead us all to read the comments of others, looking for the best one.

Well, now, I don't know how acceptable and cultural it is to get involved in the exchange of comments between two Hivers?
I did that a couple of times, but I felt left out, because I didn't get an answer, so it seemed to me that it was not a good way to engage in communication 🙂