It would be cool if there were a way to support any open source Dev or individual with cashu. Even if they were an anon email address. Send a donation then require that email to verify via link before redemption. Cash4u lol 

take a cut for the email service fees.  

 Lock the token to their nostr public key. DM it to them if you want it to be a private donation. Post it publicly if you want it public only they can claim it  

 Yes but not everyone uses nostr. (Yet) 😉