I concure with BonnieC, you are not going to get rich MS, but if you do 4-5 a day, and group together. Here is an example.
I did 3 shops in one parking lot area. I drove through Starbucks, got a sandwich at ToGo's and did a K-Mart all within 1 hour. Then on the way home got "free" gas at 2 gas shops. None of these required pictures, which made it even easier. Made $20 plus the gas.