Proof of Stake, then? Blockchain pays you in coins that are earned randomly by hosting a node? The node would need to then be part of a big distributed file sys

Proof of Stake, then? Blockchain pays you in coins that are earned randomly by hosting a node? The node would need to then be part of a big distributed file system since any even halfway decent social network would be way too large to host at home. I don't mind the idea, but where does the value of the coin come from? do you have to buy one to join? do you need to rent a coin to have access to the account? Social networks are subscriptions (or they should be, since the costs of hosting are recurrent), so what would the economic model be in "mining" and hosting one? What would give the token a value?