Zap
Zapping sends a small Lightning payment attached to a post’s Nostr event. It needs a Lightning wallet, not a Nostr login: the payment carries an anonymous zap request signed with a throwaway key, so nothing here ever asks for your identity or your keys.
Pick an amount on any post and this page hands back an invoice. Once it’s paid, the zap shows up in the reaction bar on that post within a few minutes.
A zap is only the payment — it carries no message. To say something, use the reply link under the comments on any post; that’s free and needs no zap.