I use Quicken and have a category for driving. I an app called Mile IQ and classify drives. Uber underestimates miles. Mile IQ gives a monthly report and tells does the math. Income minus miles equals profit. Part time here and there since October 1600 -1100=500. Done
Supply and demand is not always the top factor.
What is your guess for areas where Lyft pays 36.8 cents per mile less than Uber?