This is why I never tip on Prime Now, Instacart, Uber, Lyft, or Postmates: I don't trust them. Show me whatever the price is, and based on that I'll decide whet

This is why I never tip on Prime Now, Instacart, Uber, Lyft, or Postmates: I don't trust them. Show me whatever the price is, and based on that I'll decide whether to use your service today. I'm not interested in voluntarily giving your business money.