踩坑记录（一）：为“免费”付的 5 美元——一次免费层申请与退款始末
A five-dollar lesson: how a "free tier" application ended with a refund request, a closed account, and a house rule I now live by.
A five-dollar lesson: how a "free tier" application ended with a refund request, a closed account, and a house rule I now live by.