I just set up my nostr account yesterday and was trying to decide between Mutiny and Alby. I ended up deciding to go with Alby custodial option because it would have cost ~$20 to set up a mutiny wallet. I didn't understand why opening a lightning channel cost that much, and since I was depositing such a small amount I didn't mind using a custodial wallet. Can you provide any clarification as to why the setup fee is so high relative to an unchain transaction?