Why wouldn’t you use your main npub/nsec?
The purpose is to sign a message that shows the person on control of this key also has the nsec associated with this npub.
In other words, you would use this to send me ecash or send me a message on the nostr:npub1uq70uqgas9pyhds2zt57kr9se8rg3s68ztphjnq82ts8rzeknmeql7u0c2 app.
Why wouldn’t you use your main npub/nsec?
