It is good to point out this alternative is 90% likely going to be a rugpull on "nice cosy 90s style social network" by systemic factors. Regardless of the intent of the owner.

I just realised federated helps re. censorship but not privacy/secrecy needs.

It's not a rugpull, because there's nothing invested by users.

Again, there's no alternative that meets your original criteria let alone your additional ones.