Answer: Many of these businesses are trying to monetize two-sided networks.[1] It's a much more scalable economic model than just selling a product (what you a

Answer: Many of these businesses are trying to monetize two-sided networks.[1] It's a much more scalable economic model than just selling a product (what you are describing) and works well for the big guys like Facebook and Google. [1] https://en.wikipedia.org/wiki/Two-sided_market https://en.wikipedia.org/wiki/Two-sided_market