Pathfinder Adventure Path subscribers get 30% off the cover price of each volume, and they also receive the Pathfinder Advantage: 15% off of suggested retail price of all products on paizo.com, with the exception of non-Paizo downloadable files. (In the case of collectible products, the 15% discount will be taken off of Paizo's regular offering price.) This discount even applies to other Paizo subscriptions that aren't normally discounted! (If you already subscribe to these products, you need do nothing—appropriate discounts will be applied automatically.) With the Pathfinder Advantage, you can save on over 20,000 gaming products in the paizo.com store.
The Pathfinder Advantage does not stack with other subscription or sale discounts. This means that if a product is already on sale for 10% off of suggested retail, you'll get an extra 5% off. (Of course, if a product is already on sale for 50% off, you'll still get 50% off.) The Pathfinder Advantage discount will automatically be applied to all new paizo.com orders as long as you remain an active subscriber.
To qualify for the Pathfinder Advantage, the most recent volume of the Pathfinder Adventure Path must have been shipped to you (or, if you have multiple subscriptions with combined shipments, the most recent volume must be waiting to ship with your other subscription products). Any items ordered at the same time as your subscription, and any orders placed before that volume is shipped, do not qualify for the discount.