A bunch of idiots looked up....
First: Re-read the statement, "drones that were flying over New Jersey in large numbers were authorized to be flown by the Federal Aviation Administration (FAA) for research and various other reasons." So any Amazon delivery drone, or university research project would all fall under that category.
Second: the FAA and WH said all along that there was nothing there: ie beyond the recreational drones that increased in number as the hysteria grew, the drones flying all had proper flight plans, etc... Why is this so hard for people to understand? The answer is: Americans are particularly stupid, so yeah, most of what was seen were manned aircraft, and the drones were all (until the end when everyone and their stupid dog put their drones in the air to find the truth, or whatever) flying within the bounds of the law. So sorry the answer doesn't titillate, but next time you see cars on the road you don't know the names of the owners, their country of origin or their destinations, call the local police office and demand this information be collected for you and see what the response is, if they don't simply hang up on you immediately.