The key differences here is that you yourself can reward your most loyal and good commenting fanbase and they can grow with you to support you in the future. It is not just ethics so that your posts don't look like graveyards with some rewards next to them, but it is beneficial for everyone.

This should be hung on a wall so that it would be the first thing a Steemian sees when he/she wakes up in the morning. Mutual support is key on this platform.