How Do You Think About Advertising and Time Expended?

TikTok is obviously kind of an example of... It's video. There's no technology in that at all, except it's a new UX,. A new way of thinking about what a recommendation model would look like. And that gives you a discontinuity that lets you break in. Another example would be Tinder, which is also an insight about UX - not really about technology per se.