For every paid order you get related credit. It's similar to the amount.
There are 2 kinds of voucher-- $5 and $10 voucher. When your payments amount to $50 you can exchanges for $5 voucher and $100 can exchanges for $10 voucher. Then you can use your voucher for payment.
*You need to login and click "Get Discount Voucher" to get your voucher when your amount get credit points get to 50 or 100.
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