You cannot use any Codeage points when you subscribe and save. The Codeage points are accumulated and you can use them when you are placing a regular order.
It is up to you to decide if you want to do subscribe & save where you can save 15% OFF and free shipping each month or however many months you want.
Codeage points do not ever expire so do not worry you can always save them for an order that is not in subscribe and save.
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