That would require there to be another driver, which in a less populous area at 4AM might not be the case. It seems like there would need to be steep penalties on both parties if they cancel near the arranged time.
Eg: Driver cancels 2 hours before pickup. Lyft penalizes driver x% of total fee, then uses that to "bid up" the price on that pickup to entice another driver to fulfill the request at the last minute. This has the potential to help attract drivers to go out of their way, which could help in less urban areas.
Eg: Driver cancels 2 hours before pickup. Lyft penalizes driver x% of total fee, then uses that to "bid up" the price on that pickup to entice another driver to fulfill the request at the last minute. This has the potential to help attract drivers to go out of their way, which could help in less urban areas.