On August 20, Gamestop sent out a memo that on August 21, 2019, they were going to hard code against GC to GC conversions. 

之前 hard code 了买 amazon，现在是所有第三方 GC 都买不了啦。曾经先买打折 Game Stop，然后去店里洗成 Amazon，后来洗成 Home Depot，都能捞上一笔的。