It was simplest when we had forecasted RedCard Goals for the week for the store. Essentially the whole store was responsible for red cards Depending on your store volume/sales forecast/actual sales/time of year....it was automatically determined how many red cards a store needed to be green.
Now they give the responsiblity to each individual person. You can just be a Cart Attendant, and jump on every once in a while and grab a RedCard or two. And have a great conversion rate. For full time cashiers, you have more transactions, more prompts leading to a lower conversion score.