> Would you consider Farcaster and Blue Sky to be open ecosystems?

Farcaster and Blue Sky are from the same generation of decentralized social media platforms as Nostr and Lens, mentioned above. They are much more open comparative to legacy social media such as Twitter, Facebook, and Telegram, but they are still closed ecosystems as they lack interoperability and require usage of certain private keys, networks, and messaging protocols.

My favorite solution in that generation of social media protocols is Nostr due to its offchain approach. That's why I've started integrating Nostr into Spasm in 2023. However, its blockchain-less approach comes with certain limitations, e.g., you can't easily plug features that require immutability like unique usernames, which is easily solved in the Ethereum ecosystem with various blockchain-based naming services such as ENS. Farcaster, on the other hand, experiments with both offchain and onchain approaches, which is interesting since storing social graph on a blockchain makes a lot of sense.

In general, I'm not very bullish on Farcaster, Lens, and Blue Sky at the moment, but they have intelligent developers and a lot of funding, so they might come up with something interesting in the future.

Spasm is the next generation of decentralized social media and it's the only open ecosystem at the moment since it's agnostic to signing keys, messaging protocols, transport layers, and storage infrastructure. Spasm already supports Nostr and will integrate other good solutions in the future.