I really liked Uber's no-tip policy as it really did make the whole experience frictionless. That being said, I believe Lyft pools tips from riders to avoid a

I really liked Uber's no-tip policy as it really did make the whole experience frictionless. That being said, I believe Lyft pools tips from riders to avoid a tit-for-tat ratings, and drivers to not know if a rider tipped for a particular trip. If Uber follows that model, then perhaps this is a reasonable middle ground.