When you make a sale, your commission will be taken out of your credit card on file (0% - 10%, *depending on which shop plan you select). Check out this FAQ to learn about shop options.
You can select your shop plan in My Account, click "Upgrade/Renew" on the right.
(*Though there are no commissions charged for the Ultimate Shop plan, you still need to have a card on file for your monthly fee payment.)
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