I think they just wanted to see that I was a real human. They had me hold up a sign with a code written on it. The only thing I thought of was that they might compare it to my profile pic? But it makes little sense as many people have something abstract as their PFP, or a photo of their cat.
Nice try. What stops anyone from going to Madame Tussauds and posting a selfie of Frank Sinatra holding up a code? Or paying a street performer to do it. Because that would be my first thought, how to screw these sociopaths.