That doesnt work because nostr is too small. It relies on economies of scale. Nostr has 10,000 DAU. If 1% paid $10 a month. That's only $1000 a month for ALL the devs, all the relays, all the servers, all the storage, all the bandwidth. A talented dev can earn $1000 in a few days. Nostr would need to be at least 10x bigger for that to make sense. And the dev time costs many times more than the storage or revenue. Self hosted, sure. But that's how nostr was in the first few years, and there were less than 100 people, which is less fun, socially. But it's all good, just saying that the incentive system is such that nostr is incentivized NOT to grow.