The note at the end that referrals performed better than non-referrals _for drivers_ was interesting. Plus I'd say that even if this isn't earth-shattering insi

The note at the end that referrals performed better than non-referrals _for drivers_ was interesting. Plus I'd say that even if this isn't earth-shattering insight, there is still benefit hearing the results for something on the scale of Uber. I agree that including free trials with referrals and coupons doesn't make much sense. As others have commented, free trials are all-but-unavoidable in certain markets.