That's tipping. I left that in. 1. A zap is an event sent to a Lightning server, instead of a relay. It tells them who you want to send a tip to and what relays to publish the receipt to. 2. The Lightning server publishes the receipt event and that is what shows up in the feed. You could just tip someone directly or only do step 1. In practice, the servers have always done 1 and 2, but if they are reconfigured, I might bring back 1. A 3. alternative is that a LN server DMs the recipient or sends them an encrypted receipt. But that is not in the spec. 1, 2, and 3 require you to trust someone else's LN server to follow your instructions.