Most of the engineers there looked around at the country and felt there was simple things that would make life so much better for their neighbors and friends, and they knew they were wasting their time trying to make people click on advertisements. For my part my father is a veteran who had to deal with the VA for his doctors appointments and benefits and his experience was beyond bad ( which is something you can hear from lots of veterans ). When I got the opportunity to join the USDS and work at the VA with the Secretary of the VA and the Senior Executives I also felt it was a fools errand, but I figured if I didn't at least try how could I expect anything to get better for my dad. I joined a agency that was struggling to get even basic IT systems working, and with the help of world class engineers and dedicated public servants we helped millions of veterans and literally saved lives. I have had veterans break down crying telling us how much better their life is now that they can actually engage with a agency who was trying to provide them services.
Quite frankly the people who staff the USDS are not only the most technically competent, but their dedication to service is so strong, and their ability to succeed in impossible situations though sheer force of will and dedication so overwhelming they have radically changed how this country operates, and there is still individuals there who are continuing on the mission.
What did you do with your life? If your concerned about the pay cut and poor working conditions then stay at your job and see if you can manipulate people into clicking on ads better, but just know those people who you just looked down on are making a difference.
* Also for the record my tour of duty ended two years ago, and I am no longer associated with the USDS, I am just a huge fan who's life was changed by what I saw while I was there.