Tipping is a cultural convention. You don't tip for service, you tip because it is our custom. You don't have to tip, but then you risk backlash for violating s

Tipping is a cultural convention. You don't tip for service, you tip because it is our custom. You don't have to tip, but then you risk backlash for violating social norms. If you really like the service, you can tip extra. If not, you can give a low rating or and/or write a negative review and/or not patronize them again.