You can run your own relays, the obstacle is that each relay takes up many terabytes. But it’s fully open.

github.com/bluesky-social/pds whtwnd.com/…/Notes on Running a Full-Network atpr…

news.ycombinator.com/item?id=42086596 docs.bsky.app/docs/advanced-guides/firehose docs.bsky.app/docs/…/federation-architecture#rela…