I was on This American Life in 2004 when I was mystery shopping. It is a horrible way to make $7 for an afternoon's work. Spend 4-6 hours getting to store, do your interaction, come home, answer 100 questions (with narrative), ruin your day, and wait 90 days to get paid. Realize there is another thread about mystery shopping, felt this warranted it's own. If I am wrong, I am sorry. Mystery Shoppers – This American Life