This could've been an... Ecash.
LOL. Well I fucked up. I sent $5.75 to my Lightning address, which Coinbase thinks is an email address, and emailed bitcoin just like Brian did to nostr:npub1lr2zzf989mvf393y0tv39ara6a4vddkd6y87z784up9vl6ks6j3qtudl6a 😂😂 Apparently they only take Lightning invoices. 
Discussion
If Brian didn't know what the hell Lightning was a year ago, he absolutely has no clue about ecash 🤣