It’s not how much you zap. The act of zapping a note is not just a “like” or “thumbs up” you are telling the recipient that you genuinely value what they said. Some notes I zap 1sat, some I zap more. The largest zap I have sent was 2100 sats, after a really good conversation. I recently received a zap for 5000 sats after giving someone advice that genuinely helped them.

There is no “social norm” when it comes to zaps, it is more about how much value the person you are zapping provided to you.