79c88f1b_de___Payment_Service_SDK___1_8__Description
[Field] License model [Description] 
This field specifies how to distribute the license keys that users require to use digital goods. You can select one of the following options: Static: Users do not require a license key. Single: You must provide a single license key that all users can use. Dynamic: You must provide a web address for a website that generates license keys. After a user purchases the digital goods, the Payment Service server connects to the website, retrieves the license key that the predetermined algorithm generated, and provides the user with the license key. This license model is required if you want your content server to receive notifications when users make purchases within your application. For more information about dynamic licensing, visit na.blackberry.com/eng/developers/appworld/faq.jsp. Pool: You must provide a pool of unique license keys that BlackBerry App World can use to distribute a license key to each user. The pool must contain at least 100 license keys. If the number of license keys in a pool drops to 50, BlackBerry App World sends you an email message that instructs you to add more license keys. If the number of license keys in a pool drops to 10, BlackBerry App World cancels distribution of the digital goods and sends you an email message that notifies you to add more license keys.
Add digital goods to an application - Development Guide - Payment Service SDK - 1.8