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。