 an aptly named platform for a business model based on stimuli that must be repeated after only a few ticks of the clock. TikTok made a fortune with fast-paced scrolling video. Now Facebook wants a place to connect with family and friends, is imitating it. So long, granny. Hello, Reels. Twitter has done the same. And, of course, Instagram, YouTube, and everybody else trying to get rich on social media.