I don't see the reason to support a service like topcomment with delegation to get rewards, I see it as a way to reward people who actively engage, read, and actually think for themselves in a comment section with others, and have good, in depth conversations.
I did some analytics a few weeks ago on comments on HIVE, and well, we can be a lot better at actually reading each other's posts and contributing to an actual discussion - the way Internet forums used to work before reddit, tiktok, and all the other social media networks that the kids are on these days. :P