I walked by one of these scanning offices in São Paulo a few weeks ago and it looked completely dystopian. Didn't have the impression that the people who showed up there were well informed on what they were signing up for
Sort of like a beggar, but asking the couple to go inside, scan their iris then giving him the money (since it’s free money anyway). I am not sure how that would work in practice, since I just passing by. But they were paying USD50~60 , a significant amount to make the ask worth it.
How much iris variation (within that population) exists, are there any repeats (or repeats below threshold), is there any correlation between (say) iris pattern categories and facial pattern categories, etc.
Someone may think these are useful questions and this may be the first of many such data collection actions about the globe.