Some insights from the mobile free-to-play market: for a solid game, a typical conversion rate from non-paying to paying player is somewhere between 2 and 5 percent. Monthly ARPU (Average Revenue Per Paying User) is around 20 USD for a successful casual game (can be much more for more complex titles). Keep in mind that the purchase value distribution is heavily skewed by whales. If think the could be similar for nostr creators, at least in principle. Assuming a player is analogous to a follower, creators should be able to earn a decent living (decent by Polish standards, shit's expensive in the States) from only a handful of followers (10000 followers * 2% * 20 USD = 4000 USD monthly). Does it really play out like that in reality? No idea, I don't have the stats and probably there are not enough full-time nostr content creators to draw any conclusions. But if zaps become TRULY frictionless - I mean one click onboarding and (unfortunately) easy fiat onramps like credit/debit card top-ups - I think it might work, especially as monetization practices (premium content, badges, leaderboards) mature. Shame we only have 10 users.