I don't know where everyone goes wrong. I completed two surveys yesterday. One for 150, and one for 75. This usually occurs every other day or so for me.
Ampario is looking for a certain criteria of people. Make sure your telling them that your the sole decision maker for the house hold, and things like that. You can't keep responding (no) to the questions and expect to keep going forward with the survey.
The surveys and payouts do work. The 450 Ampario survey is a tough one to qualify for. Don't get discouraged if you don't qualify the first or second time.