Its besides the point though.
A lot a less know MAs doesn't do full sparring,it doesn't mean it's useless as a self defense option.
People here,like the ragingBJJ dude above,think that if you can't use in a cage or against another well trained fighter at any occasion,it's useless.
Ive did on and off security work and i can tell BJJ it's useless or useful depending on the circumstances of the fight you get in.
I can tell the same about aikido or ANY TMA.
the small joint manipulation is very useful to control a problematic individual if you need to take him out of the room.
I know for a fact that the metropolitan subway security corps.(in Sao Paulo/Brazil)used to train their operatives on basic aikido techniques as a option to control threatening individuals.