Uber is still trying to chip away at the perception that its ridehailing service is too expensive by launching a new feature aimed at helping customers save money on frequently traveled routes.Today, the company is launching prepaid passes, in which customers can pay a discounted price in advance on frequently taken trips. Passes will be offered in bundles of 5, 10, 15, or 20 rides, with the bigger bundle earning the bigger discount. Discounts range from 5-20 percent off the average cost of the ...