Unfortunately not all relays obey this and some clients rebroadcast notes anytime they interact with them. So it almost makes it unusable as a paywall.
Really unfortunate. To me, it just confirms that Nostr is only ever usable as a mass broadcast messaging system. Which is okay, but just kills the whole idea of paywalls, "small relays", etc.
quotingYeah, unfortunately no guarantees on preventing rebroadcasting - just our best effort solution. It is effective on most relay implementations but there is nothing stopping anyone from accepting the notes if they want.
nevent1q…cksy
It will be rejected by relays that support expiration or “-“ tags. Resharing of Creatr hosted media is more robust.