If you live in the U.S, using credit cards is both a fun and efficient way to earn rewards while spending money that you would’ve spent anyway! By spending a little bit of effort on applying and using cards, it’s very simple to earn a round trip flight to China or other countries. If you adopt c...

2019.5 Update: According to data points on reddit, AmEx Biz Gold and Biz Platinum now become “stud cards” as well. They have the highest referral bonuses, so if you have them, they are the best cards to generate referral links. These days, it seems AmEx has made some changes to their referral pr...