I finally switch my credit card reward to a 0.5% cashback on every 2$ spend and there's no annual charge. I don't like the airmiles reward on spending 40$ to get 1 point. It takes too long and the only reward that I'm interested is the plane ticket which cost 3 500 points for low season and 6 to 7 k of points. It will influence me to spend more and I don't want that to happen, also it's a pure waste of time! With the 0.5%, I can add the cashback money in my challenge.