Sometimes the comments under either the question or the answer are the more valuable information. That is, an answer might be just satisfactory, but it's really the comments, and their additional information that proves to be the most helpful. Therefore, why not provide a means of acknowledging this?
Originally intended to put this additional question/observation in the comments, but following-up on the answers, here, attempting to set a good example, I'll also incorporate it into the question. Afterall, I've lost all my accumulated reputation by just asking this one question, so it can't go any lower ...
This is a different site, of course, and I've not yet figured out how to ask a process question on the BH site, but under their "Help Center" info on privileges and reputation, there's a statement that appears to indicate that one can receive a positive point on for a good comment" ...."When should I vote up? Whenever you encounter a question, answer or … a comment that you feel is especially useful, vote it up!"
Apparently, they accomplish this by "flagging" the comment as positive.
Here's some more information, from that other site that allows for "comments" to be voted on:
Privilege: comment everywhere - Leave comments on other people's posts What are comments? Comments are temporary "Post-It" notes left on a question or answer. They can be up-voted (but not down-voted) and flagged, but do not generate reputation. There's no revision … privilege. How do I comment? Click the add a comment link under each post. Comments cannot be multi-line, so simply press enter to submit your comment. Note that comments support a small subset of …