IPv4 is not the default on any of the platforms you mentioned, it’s a paid add-on you must pay extra for.

It just seems strange that a federated social network platform who wants as wide of an audience as possible, gatekeeps who can participate based on a trivial self imposed limitation.

Hope I don’t sound like a hater because I’m excited for this, but yea it’s a bigger deal than a lot of people think. Even just dealing with bots is 100x easier when you have v6 because you can fine tune rules based on ASNs much easier when you can expect v6 addresses from certain networks and what not. We saw this in India the most where most bot activity would be v4 only, while humans would connect over v6, so we could dynamically tune sensitivity on challenges based on solve rates and what not.

Another option is using zrok - https://zrok.io/. Its open source so you could build it directly into Bluesky and either host the backend yourself or use the zrok free SaaS. zrok also has SDKs so you could embed the capability directly into your binaries without having a separate agent.