Isn't it the same? I can zap your note from my minibits wallet, and you would receive ecash. If you zap me I receive ecash. If I add your contact to my wallet I can send direct ecash to you from the wallet.
Discussion
Maybe your custom address works, mine currently only works with the generated ones.
I only changed the username. I sent you 21 sats, zero fee, because it's the same LN node from minibits. Still don't know why it doesn't appear as a zap in the note though. Either way, the wallet is very nice.