Discounts not cumulative. Qualifying trips must be completed in Phoenix metro between Monday, May 2nd, 2016 4am PDT and Monday, May 9, 2016 4am PDT. Discount will be valid on up to 10 uberX trips between Monday, May 9 6:00 pm PDT and Monday, May 23 6:00 pm PDT for trips in Phoenix metro. Discounts only valid up to $20.