No, that would be a failed business.  There are only 10k DAU on nostr.  If 1% paid $10 a month, that's still only $1000 to share among all the relays and all the businesses.  It's not enough because some developer make $1000 in a few days.  And that $1000 has to cover the whole of nostr.  Nostr is too small to have businesses right now.  Businesses require economies of scale, so nostr would need to be at least 10 times bigger.  But that's OK.  Nostr is still fun at its current size.