Use explanation from airbnb#71

Author: iamnirav

README.md

@@ -1191,9 +1191,9 @@
 
 ## <a name='events'>Events</a>
 
-  - When attaching data payloads to events use a hash instead of a raw value.
-
-    ```javascript
+  - When attaching data payloads to events (whether DOM events or something more proprietary like Backbone events), pass a hash instead of a raw value. This allows a subsequent contributor to add more data to the event payload without finding and updating every handler for the event. For example, instead of:
+    
+    ```js
     // bad
     $(this).trigger('listingUpdated', listing.id);
 
@@ -1202,7 +1202,11 @@
     $(this).on('listingUpdated', function(e, listingId) {
       // do something with listingId
     });
+    ```
 
+    prefer:
+    
+    ```js
     // good
     $(this).trigger('listingUpdated', { listingId : listing.id });
 
@@ -1212,6 +1216,7 @@
       // do something with data.listingId
     });
     ```
+
   **[[⬆]](#TOC)**