I think it's causing swarms of little ones but it's not worth stopping for the rewards. The depth of earthquakes, often come from deeper areas, though shallow can be destructive. But if they find evidence that the process is destabilizing the plates or potentially setting up larger ones, then they need to study and limit the procedures more.
More research would be a good thing, but just so people know, the fracking procedures of long ago are not the same as the ones being used present day. Years ago, vertical fracking was the practice, now, they're performing horizontal fracking, quite different than what we're used to hearing or having knowledge about.