Thanks for your feedback, discussion on this would be great :)
I think even if the rewards for comments aren't changed, this tweak could help incentivize discussion and voting on comments regardless.
It would still encourage people to participate, for the chance to have a high voted/paying comments to be seen front and center along with posts.
As people see others getting attention for posting good comments, others will be incentivised to join in - even if it's just for a chance of a payout.
I believe the rewards would then increase on comments because they would be easier to find, plus it helps promote the overall post that people commented on - this can aid in finding undervalued posts as well.
I do have to say that I think a higher reward would make this addition even more useful and valuable overall, but I don't think the change to the rewards is essential for this idea to at least help improve comment quality and output.
Thanks again for the vote and comment :)