All as its supposed to be 

 Hey, I just sent you a tip of 20 Nostracoin.
Nostracoin can be used to record your nostr events in the blockchain.
You might want to do that because
    1. It is censorship resistant
    2. Timestamps your note
    3. Never drops your note

You can check your balance or view Nostr at https://nostraco.in 

 Why would anybody want to do that? 

 Just buy some lightning bitcoins with your monero and Zap. Lightning btc are very private. But that hardly matters because zaps are generally public info documented on the realys. 

 Take a look at the NIPs for zaps - and reproduce the flow with Monero or something else. :)
Actually not hard, someone just has to do it. 

 https://bounties.monero.social/posts/94/12-000m-nostr-client-for-monero