There's no function similar to "likes", "upvotes", or "reddit gold" that incentivizes good faith communication either. The features are too ambiguous. One community on reddit https://www.reddit.com/r/changemyview/ invented their own "delta" awards, where you submit a stance, people try to convince you otherwise, and if they do, they're awarded a "delta".

It's a small community, but it's an interesting experiment at what online communication could be.