Understand the image by reading this post https://www.tiotrom.com/2020/10/the-social-ad-networks-the-fediverse-and-my-live-is-back/ (update no 4 is a fresh update).
This image is bliss :). It is how we organized our social networks. Automate them. And moved away from posting on ad-networks or using them. We only use Friendica for everything, but all of our posts and updates go everywhere. Users can choose where to follow us. And it is less work for us. And free. #tromimg