But there’s much more to Rotten Tomatoes than meets the eye. “It was quite a genius, outside-the-box idea,” co-founder Wang wrote of Duong’s brainchild in a personal blog post celebrating Rotten Tomatoes’ 20th anniversary. Similar to Siskel & Ebert’s thumbs up or thumbs down, Rotten Tomatoes operates on a binary. “[Studio publicists] were generally wary of online critics and treated them as second-class citizens,” Duong explained in a Rotten Tomatoes history piece. In 2018, Rotten Tomatoes expanded its Critic Criteria to include YouTubers, podcasters, and self-published bloggers.