Guess its a question of scale. Those other networks, how many followers do they have? And is that network made for her kind of content, or is it a general network like twitter?
Discussion
No, i think calculations were right. It was the amount of zaps / zapping users as the Nostr number. It wasn't even a zaps / view count. So, even if she scales, the zap/user will likely stay the same.
Could a subscription model work? Pay people monthly to get some perks or exclusivity.