Its not as bad as it sounds. Servo connectors in general have that limit. The limit however is for CONTINEOUS current. More than that will start heating the contacts up. But our servos draw this type of current only in short burst so we get away with it on high torque digitals. BTW those "hubs" are just like a multiway Y lead. All you need for the feed is uprated power wire, never a bad idea anyway. In effect the reduced connector count as opposed to extension leads as a solution, is fewer points of failure and lower power use/less voltage drop. ( with uprated power cable )