I'm going to err on the side of caution here because i haven't read anything to confirm or deny the theory that things spinning faster makes their gravitational pull grow. However, my theory based on how much knowledge of the subject resides in my brain is that it would have no effect on the gravitational pull at all since the mass of the object isn't changing. If you were on the surface of the big spinning mass then it could possibly be that the centrifugal force is acting on you and if the spin becomes fast enough, it could propel you off the big spinning mass. (I'm not sure if centripetal force comes into this theory) But thats just one force being stronger than another, the gravitational force is still the same.
Seek a second opinion
