If having global state on a single server is important, you get to choose two:

1. Long term storage
2. Censorship resistant
3. Cheap

A few of things:

1. You can keep paying for storage and as long as someone is running a valid Hub your content will be preserved. You could even make a smart contract that drips out payments for 100 years.

2. Anyone can pay for someone else's storage ($3 in OP ETH)

3. Back up off protocol on Arweave or onchain

Say more about #1. I was under the impression that hubs have built in pruning and a max storage size for the entire network.

Writer. Building @pinatacloud. Tinkering with a Farcaster native alternative to GoodReads: https://readcast.xyz \ https://polluterofminds.com

If you cast something, just keep renewing storage each year and the casts will stay on the hub. Pruning is per account.