Do you not think that 1,000 subscribers at $5/month is very possible for a client app - as an example?
That certainly should cover server costs, and be at least a supplementary income.
If you 10X that to 10,000 subscribers, that’s 50,000/month. I can’t see how at least some Nostr services can’t achieve that.
Keep in mind the $5 is just an average price/user. Maybe premium $15/month users make up 50% of revenue. Business may pay even more.
For sure, if you have many full time staff, pay for OS contributions yourself (instead of community fund), and don’t grow as your subscriptions and Nostr community grows, you’ll have a hard time.
As a side note, if Nostr has let’s say 10 great client apps for social. If each app has an even share, that’s only 100,000 total paying customers for the $50,000/month per client app revenue. If Nostr can’t attract let’s say 10% paying customers with 1 million total users - it will stay niche and likely die off slowly or centralise anyway.
Unless I’m tired and my numbers are bogus.. seems achievable within next two 10X growth cycles to 100X from today. I’ve already been through four Nostr 10X growth cycles.