It is useful for new no coin users to be able to send and receive zaps without having to use any perosnal information or pay. It fills the 0-100k sat gap that users face if nostr native to bitcoin. They need a custodian until they can open a 100k sat self cutodial channel.

I'm still figuring it out myself but from what I understood the differences were that the Zeus Lightning address has a time limitation if the user is offline for more than 24-hours then the payment is returned to the sender. Where as the Minibits Lightning address doesn't. Also, the Minibits wallet ...