It can feel like you are answering questions about your income, living situation, country of residence, and job all the time, and you wonder - "why the heck do I have to answer this again and again? Can they not just remember that once and get me to the juicy stuff?"
Well, yes and no. The first qualification questions you answer with a new survey partner (in our case, CPX, InBrain, TapResearch, and BitLabs) are asked so that you will only get relevant surveys for your profile.
However, when you get into the actual survey, the market researchers behind that particular survey want to make sure that you did not just hurry through the first qualification questions. They also want to check if something changed in your life just before taking the survey that could ruin their data if they did not know about it. So they ask you again to be extra sure.