I’ll give you an example: why would anyone pay for my relay?
I’ve got 99% uptime, but why pay for that when Nostr.wine has a global network, and relayable has one for free?
I’m not complaining about them being better - I’m not in it for money to begin with - but I don’t see I path to financial incentive for me that doesn’t involve me quitting my job, which Nostr will not get me through.