Steem does not have a very effective way of sorting the content that is placed in the different tribes. Sportstalk is changing that by adding different categories to their tags.
For sports, this is very important since fans of teams often do not want to associate with the fans from other teams. This is especially true for those that are rivals. Red Sox fans tend not to get along with Yankee fans. The same holds for Auburn college football fans and their feelings towards Alabama.
This could be the start of a breakthrough for Steem. By having the ability to route people directly to what they want, we could see retention rates move up. Newer people will find material that is of their liking specifically. If they want to venture out into other areas, that option is available. However, they will not get bombarded with an out of control stream of content that is all over the map.
Here is the announcement post put out by sportstalk.