Just heard back from my scheduler about ratings (Per the continuing ath Power discussion on another thread). She said,
"We do not grade shops. Every shopper starts with a shopper grade of 5, that only changes if you do one of two things.
#1 flake on a shop then we give you a 1.
#2 Do one of the shops that we offer a shopper grade of 10 on.
There you go!