If you want to make sense of this. It's better to think like physicist and start from "spherical cow" model. The asymptotic limit to the whole market is set b

If you want to make sense of this. It's better to think like physicist and start from "spherical cow" model. The asymptotic limit to the whole market is set by people's income. * Ad revenue will always be small fraction of total income * All fun, social and leisure activity is fraction of discretionary income. "Eyballs"/hour is the future source of growth because all societies move towards becoming post-industrial consumer based societies and people spend more time staring at the screen. Tech companies, no matter how tech, produce products and services where the value is increasingly coming from discretionary income and services. There may be several links between the product and the consumer.