I am positive to the idea of listing people who do streams of them mapping. I even think it might be worth showing the number of active streams. However, the current visual look signals to me that there is something I personally care about. The design looks like a notification of an event I have expressed interest in. But, I haven't expressed any interest. I haven't subscribed to any mapper. There is no "event" that I am currently interested in. So, how about a different visual design to make it clearer that it is a global status and not a personally relevant event?