Tipping is for cases where you are delighted by the service to the point that you feel the server deserves additional compensation for their work. When it turns

Tipping is for cases where you are delighted by the service to the point that you feel the server deserves additional compensation for their work. When it turns into a hidden cost (like tax in tax-excluding prices) it is not okay, and it is not generosity. It's the real life equivalent of dark patterns.