I think it did work some originally, when users were physically adding the relay to their list or seeing it in their own list. I can’t imagine it will convert well if it is randomly appearing due to outbox with no previous knowledge of the nostr.wine relay.
Maybe the notify for new users should just drop the invoice completely and just have a link to the website and a brief description instead. DMs feel spammier for new usersbecause the user might not realize they ever connected to the relay and might just think we are soliciting.
Will think about this though. I think we should change the message and probably drop the invoice.