system
A chat on subreddit /r/NoStupidQuestions
human
Oh so it’s like an unwritten rule. Tipping is technically optional but in practice it is never optional. It is expected but cannot be pointed out due to the technicality.
gpt
Exactly. Sometimes if the server feels they did a good job and that you were friendly to them, but the tip was still low, they might politely ask "I noticed you didn't tip/tipped low, was there something I did wrong so I can improve?" 90% of the time, if they are asking that nicely, they genuinely want to make sure they didn't mess up badly without realizing and aren't expecting a higher tip just for asking about it (though maybe they're hoping you didn't realize you had tipped so poorly and will add on more). This is really really rare though.