The fact that the mint has the capacity to log Cashu users through things like timestamps can be used to determine what time zone a person is in and therefore their location, present an identifiability threat. It's a good thing so many people are smart enough to use some kind of protection with these kinds of applications.

Also, how is Cashu a separate protocol if it's built from Lightning and used for Bitcoin? It's a L3 application. That's like saying that BTC on-chain and BTC on the LN are separate protocols.