________ attracts video game lovers and sports enthusiasts through contests. The company also encourages the most dedicated community members to contribute ideas on company products.
United Airlines originally apologized only for the "overbook situation" that caused Dr. Dao physical harm. After two days, United Airlines changed its public responses due to ________.
________ provides a live notification when its customers are close to physical stores that sell its products. The company then uses Foursquare to send them coupons and discount information.