Wild guesses are nearly always junk, but some of the best physics looked like wild guesses before lots of testing. I didn't get into just how an object could h

Wild guesses are nearly always junk, but some of the best physics looked like wild guesses before lots of testing. I didn't get into just how an object could have a net electric charge, but IIRC such a state is accepted as possible in astrophysics. For the FRB being not continuous but only intermittent, maybe the orbit is not perfectly circular; maybe there are other effects that make the FRB intermittent. Science does not start with a testable hypothesis but with intuitive guesses; the more solid stuff comes later. In this case, for these FRBs, we know so little that doing solid science has to wait and all of us can guess!