There actually are comments. Making them "live" as you say is actually a really good idea it can be like a "proposed change" kind of thing where a user makes a change and people vote on it to see if it gets changed or not. If a certain amount of people vote for the cahnge then it replaces the old code.
I made the app because I am always looking for little code snippets such as cases where I need to find regex to extract URLs or Emails, so I figured why not create a site where people can post short little bits like that and make it searchable? So that was the motivation.