The tracker is working fine and didn't break. Looks like their servers are no longer talking to the Stream API, which means there is no real-time data (for anyone, including their own kill feed stats). That's something they'll need to fix.

{"online":{"EventServerEndpoint_Briggs_25":"false" ,"EventServerEndpoint_Cobalt_13":"false","EventSer verEndpoint_Connery_1":"false","EventServerEndpoin t_Emerald_17":"false","EventServerEndpoint_Jaeger_ 19":"false","EventServerEndpoint_Miller_10":"false "},"service":"event","type":"heartbeat"}