Just tested it, it returns people with some similar features but that are obvious different persons, different face shape and size , maybe facial hair and glasses confuses it or they could not find any better matches so they returned just something so it is not empty.

I tried it with a picture of me and the top half dozen photos were, in fact, pictures of me. I was originally thinking there were also bizarrely a couple of photos of signs and then I realized I was standing next to a sign in the photo and that's what caused the algorithm to stick a couple of signs in there.

I tried it before and found it absolutely amusing because it would find tons of doppelgangers of any person.

Amazing! I just tried it on a picture of me, and it found several other photos of me that I had no idea were on the Internet, and a few photos of people that looked so much like me that I thought it was until I took a close look.