Cashback Get a percentage of your spending back in the form of cash or rebates. It is credited back into your credit card account to offset your next purchase. To earn higher cashback rates, some credit cards require you to spend a minimum amount each month. There could also be a cap to the amount of cashback you can earn. Miles Earn miles for every dollar you spend. Whether in economy class or first class, these miles can be used to redeem your next flight out of Singapore. It takes time to accumulate sufficient miles to a destination outside of Southeast Asia, unless you spend big. Your miles might also expire before you have the chance to use them.