I don't always want to write a new post about a topic. Sometimes, I'd rather search for an existing post about the topic to add my comment. I appreciate that Ecency has a search function for Hive overall. But, what I find particularly useful is the search feature for each community.
While I'm at it, I also appreciate the related posts that show up at the bottom of every post. This makes discovering other posts much more natural. While many posts might be beyond their reward period, I can still comment to give the author a chance to earn comment rewards.
These features, along with earning points for promoting content, make using Ecency a pleasant experience.