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Learn how to add billing code to your app to prevent selling it for free. If you published a public app without the appropriate billing code, your hard work would be distributed without any compensation (aka "moolah") This will cause you lots of grief and heartache if the "giveaway" is not exactly intentional. Use Shopify CLI to Add Billing Code Template to create billing code. The most important things to consider are: Plan price (line 5), Currency (line 12), Trial Days (line 8) and trial days (line 7)