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It's because the we limit the quantity based on our stock.
If you do not make payment until a specified limit (00:00 on the next day of your oder) then your order will automatically be canceled
If there is an event, we usually share it on our social media. You can use only one coupon per order
In case you haven't found the answer for your question please feel free to contact us, our customer support will be happy to help you.