title: Workaround to lack of promotional codes for in-app purchases
body: <p>Apple doesn't offer promotional codes for in-app purchases. What's the best way to let users try the features or content unlocked by in-app purchases for free, while complying with Apple's Developer Guidelines?</p>
  
  <p>The idea is to allow a special set of users (reviewers, key fans, etc.) to access the content or features offered as in-app purchases without paying.</p>
  
  <p>Examples of apps that worked around this limitation would be much appreciated.</p>