It's the same as the Microsoft "How old are you?" and Google "What painting do you look like?" apps. People don't think about what's going on behind something that seems trivial.
Somebody, probably a political organization, ran an opinion poll on the UN and got anonymized aggregated results. What part of that made you delete the app? If you get a political phone survey, will you unplug your phone?
In Microsoft's case, my guess is that it was just a research experiment. It worked pretty well on a few family photos I threw at it.
I think that the site is not even working anymore. Anyways, they said they were not keeping the images, and I have no reason to doubt it.
It's a pity that Microsoft is going only after the corporate market, Oracle style, and not trying to make money from consumers any more. That leaves Apple as about the only big independent player in that field. We could have benefited from the competition.
