I believe people who engage on your content are the most important users to you in the community. I think rewarding comments goes a long way to make them feel appreciated.
This is the benchmark for me for voting comments on my posts. The fact that they came around and ought to be appreciated.
Someone did mentioned the rewards of voting comments going back to the pool.... It completely discouraged me from voting those thoughtful comments
It's a good thing the hardfork 25 made it possible to appreciate my followers who appreciate me and my writings through their comments