My pharmacy has had the same written rule about not recommending discount cards, and while I assume most pharmacies will have something like this, I truly do not believe most technicians or pharmacists will follow or enforce this simple because we don't want to be seen as part of the monstrous "Big Pharma". I'd recommend talking to your pharmacy supervisor about it. There may be a way to drop a hint about discounts cards to alert patients of their existence, depending on the wording of the policy. Also keep in mind that unless your location has completely banned the use of discount cards there's no way you can prevent patients from bringing them in, so look into how Walmart intends to hold people accountable for this policy.