Last year, I blogged about how I used Citi PayAll to pay for my income tax and in the process, I earned 1.2 KrisFlyer miles per dollar. Long story short, the earn rate was 1.67¢ per mile. CardUp is another option that can be used to pay for income tax as well as other payments. I have actually used CardUp back in 2017 but didn’t get around to blogging about it. CardUp is basically a credit card enable-ment platform, which enables the payment or collection of big expenses using credit cards, in places where cards are not accepted today. What is the catch for using their service? Simple – an admin fee is payable. I get it – no ones likes to hear the word “fee” but wait, don’t leave yet! Why do I go to so much trouble? Business class flights. Just before the craziness of 2020 hit us, my wife and I flew on business class yet again...