administer referral programs, rewards, surveys, sweepstakes, contests, or other promotional activities or events sponsored or managed by Airbnb or its third-party partners,</li> <li>analyze characteristics and preferences to send you promotional messages, marketing, advertising and other information that we think might be of interest to you, and</li> <li>invite you to events and relevant opportunities.</li> </ul> <p> <strong>3.4 Provide Payment services</strong>.