GoUSA!!!

So traveling to the US and downloaded the app. I completed the forms and took the photos. I got the CPB officer and told them I had done MPC and he said “yeah whatever” and took additional photos and asked all of the questions I answered in the app. This is despite the signs in the waiting line telling people to download the app. I can only assume this is some sort of data accumulation program for the government and the app provides no benefit to the traveler getting through security.