Consider the answer I posted here: How to convert nanoseconds to seconds using the TimeUnit enum?
It is actually an improvement to the most upvoted answer. However, had I just made an edit to it (the most upvoted answer), I would have received no reputation for further upvotes. This way, however, I received 5 upvotes until now and even earned the Necromancer badge for it.
Do you think it would make sense if the editor could also earn some reputation for subsequent upvotes?
Perhaps this could be part of the edit review process, where the reviewer has e.g. a checkbox to tell whether this edit actually builds upon the original answer, so that the editor should also receive reputation for further upvotes.