Shoppers may perform up to 2 shops inside the store and 1 pick up shop per location per 4-week period. Shoppers may perform up to 4 shops inside the store per day (different locations, of course).
Shoppers may perform up to 8 pick up shops per 4-week period.
Shoppers may perform up to 3 pick up shops per day, but doing so can be a red flag to the client because seriously, WHO places more than 1 order a day at a grocery store who isn't a shopper?!
There are other rules in place, but this is the gist of it.