I'd assume Lyft has the information as to who you tipped and how much. However, my understanding is that the driver does not know which individual tipped them (and rates the passenger lacking this information). The driver's tips are summed up in a daily report making it difficult to know who tipped and how much
That's exactly how it should be designed in my opinion. If the driver is doing a good job, his total tips will go up. No point in haggling with individual customers.
