Why would you join the most exciting customer loyalty program?
Perhaps you already have joined an affiliate program for cashback purposes. Perhaps you give a loyalty discount directly. We know however that customers who are only motivated by a discount or cashback are not really loyal shoppers. It doesn’t really give them something which they can not get elsewhere.
It also doesn't show that you care as a brand for the customer. So why join PAI? PAI is the only loyalty program where all rewards go towards the customers pension savings!
By joining PAI you can assign your marketing budget to social responsibility and vice versa. When you join PAI you ensure that your  customers can still shop with you after they retire. You know it makes perfect sense!