They advertise it as a part of the price of a hotel (you pay a higher price and get cashback later) but when you actually go to the terms and conditions:5. Please note that the cashback reward, being a gift from Agoda to you as a valued User, is at and shall remain at all times in Agoda’s sole and absolute discretion. You understand and accept that Agoda will not at any time incur any obligation to you in respect of the cashback reward, and you will not have any claim against Agoda in respect of the cashback reward. Agoda reserves the right to discontinue the cashback reward program at any time following which the User will not be eligible to request and receive any further cashback reward (including any cashback reward in respect of which the Earn Date (as defined in Clause 7 below) has been reached) whether by way of set-off or otherwise, save for any cashback reward which has already been requested by the User by way of submission of the Cashback Information.

How can this possibly be legal? I ask because I have been trying for days to redeem it on the app, doing all the things they require and I keep getting an error saying