Diagrams of how BlueSky and its AT Protocol functions, compared to how The Fediverse and its ActivityPub protocol functions. BlueSky's traffic flows from servers to corporate-owned relays, and these relays communicate with each other before allowing traffic to flow to servers. The servers cannot communicate with each other at all. The Fediverse's traffic flows directly between cheap-to-run servers, with no need for any corporate involvement. While technically these are both forms of decentralisation, the BlueSky interpretation puts corporations, rich people and wealthy organisations in full control of the network. The Fediverse interpretation puts ordinary people in full control of the betwork.