In the fiat world, maybe, nostr doesnt need engagenent metrics to sell to advertisers. We can all go for a month long vacation and come back and it would still be the same.
Discussion
and investors.
But the nostr system relies on the generosity of relay operators who continue to fund the infra (or entities who give grants).
We can hope that their generosity continues because when <0.1% are retained, then usually only 1-10% convert to paid, which means that charity will be needed. Sustainable monetization for relays is needed before the music stops.