you agree that promo codes : -lrb- i -rrb- must be used for the intended audience and purpose , and in a lawful manner ; -lrb- ii -rrb- may not be duplicated , sold or transferred in any manner , or made available to the general public -lrb- whether posted to a public form or otherwise -rrb- , unless expressly permitted by uber ; -lrb- iii -rrb- may be disabled by uber at any time for any reason without liability to uber ; -lrb- iv -rrb- may only be used pursuant to the specific terms that uber establishes for such promo code ; -lrb- v -rrb- are not valid for cash ; and -lrb- vi -rrb- may expire prior to your use .