The first thing to do is segregate your previous and current customers into active audience lists and identify their LTV. If your current campaigns generate a lot of repeat shoppers, then note the original campaign will be dedicated to them. It isn't guaranteed the other campaign won't serve first-time shoppers, but as of writing, it is as close as you can get. Implementing the incentiveAt this point, you've separated your campaigns into new/first-time customers and repeat customers. One is the control/evergreen ad (something you would also use for the repeat shopper campaign), and the remaining ad(s) with an incentive.