Lets make this thought experiment.
I throw a spaceship inside a black hole. Then, this spaceship start its motors and accelerates rotating around the singularity at great speeds. Due to relativist effects, the spaceship would make a greater deformation of space because of its increased momentum (even though it is expelling matter in the opposite direction, but this matter never gets out the black hole).
Should the radius of the black hole increase due to having more energy (like having more mass)? or does conservation of momentum cancel this effect? would it matter at all? (notice that no information, even gravitational deformation/waves escape the black hole)