I think the confusion is trying to compare different use cases, I don't think there is any scenario where anyone should recommend storing their onchain bitcoin with a custodian.

It's not so obvious in the "small amount you goof around with on nostr" case. 

 I suppose having multiple options is fine so you can choose the level of trust-minimization you desire, but calling it sats instead or ecash feels wrong/posing — like bcash vibes. 

 funny thing is “bitcoin cash” would be a decent name for it 😆. zap cash? Lightning IOUs? 

 Ecash Zaps is plenty clear and sounds quite cool.