Experiential advertising: refers to the advertising method that allows consumers to participate in product trials in person, feel the quality of the product, accept it unknowingly, and trust the product. Which of the following are not experiential ads? ['At the entrance of a subway, passersby will get paper towels for free.', 'In a large supermarket, a salesman is distributing a new orange juice drink developed by a juice company to customers for free.', 'Just add a cosmetic company\'s WeChat and send "I want to try" to get its new mask trial set for free.', 'After the news that a well-known furniture chain company opened a new experience hall in the downtown area, it was overcrowded.']