Squarespace recently fixed a bug where products on disabled Products Pages could be added to the cart – previously, if you had a product on a disabled Products Page shared elsewhere on your site (in a Product Block or Summary Block, or linked directly to the URL), the product could be purchased. If you're noticing products can no longer be purchased, double-check that the Products Page is enabled (you can move it to your Not Linked Pages to keep it from appearing in your navigation.
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