There was a point when Lens was more decentralized than Faracster, but now that has reversed. Hubs was a good choice because IMO without its own network that can be optimized a web3 social network can't scale. Lens has become more and more centralized. Wrote some scattered thoughts on this last year https://t.ly/XhBU-
Any social network with a centralized invite system is by definition not decentralized. :)