The current Uber One Members week 20% rebate offer terms and conditions refer to active membership at the time of booking and at the time of travel, the latter slightly different to the date the rebate comes through. It does also state the rebate will be paid within 10 days of completion of the first leg of a booking. I fully understand comments as to whether the paid for version of Uber One is worth it, depending on any offers Uber make to reduce the normal monthly fee, though with the free 30 day trial, including the Members Week 20% rebate, it is proving a considerable saving for tickets booked for travel both during the week and booked during the Members week for use until the end of the free trial.